The following is locations' in The 39 Clues series.
- 1 Attleboro, Massachusetts, USA
- 2 'Sconset (Island of Nantacket)
- 3 Miami, Florida, USA
- 4 Boston, Massachusetts, USA
- 5 Philadelphia, Pennsylvania, USA
- 6 Paris, France
- 7 Vienna, Austria
- 8 Salzburg, Austria
- 9 Tronchetto, Italy
- 10 Venice, Italy
- 11 Moscow, Russia
- 12 Tokyo, Japan
- 13 Seoul, South Korea
- 14 Cairo, Egypt
- 15 Luxor, Egypt
- 16 Aswan, Egypt
- 17 Volgrograd, Russia
- 18 Saint Petersburg, Russia
- 19 Omsk, Russia
- 20 Road of Bones, Russia
- 21 Yekaterinburg, Russia
- 22 Sydney, Australia
- 23 Coober Pedy, Australia
- 24 Darwin, Australia
- 25 Jakarta, Indonesia
- 26 Pretoria, South Africa
- 27 Johannesburg, South Africa
- 28 Witbank/Emalalenia, South Africa
- 29 Durban, South Africa
- 30 Madagascar
- 31 Beijing, China
- 32 Denfeng, China
- 33 Xian, China
- 34 Tingri, China
- 35 Mount Everest
- 36 Nassau, Bahamas
- 37 Boucan Cay, Bahamas
- 38 Montego Bay, Jamaica
- 39 Kingston, Jamaica
- 40 Spanish Town, Jamaica
- 41 Port Royal, Jamaica
- 42 Moore Town, Jamaica
- 43 London, England
- 44 Stratford-Upon-Avon, England
- 45 Cahill Island, Ireland
- 46 Dublin, Ireland
- 47 Monaco
- 48 Casablanca, Morocco
- 49 Zurich, Switzerland
- 50 Zermatt, Switzerland
- 51 Florence, Italy
- 52 Lake Como, Italy
- 53 Rome, Italy
- 54 Lucerne, Switzerland
- 55 Basel, Switzerland
- 56 Neuschwanstein Castle, Germany
- 57 Prague, Czech Republic
- 58 Sedlec, Czech Republic
- 59 Goreme, Turkey
- 60 Samarkand, Uzbekistan
- 61 Heidelburg, Germany
- 62 Berlin, Germany
- 63 Pompeii, Italy
- 64 Timbuktu, Mali
- 65 Mumbai, India
- 66 New York City, New York, USA
- 67 Yale University, Connecticut, USA
- 68 Sao Paulo, Brazil
- 69 Foz do Iguazu, Brazil
- 70 Syracuse, Sicily, Italy
- 71 Washington DC, USA
- 72 Chicago, Illinois, USA
- 73 Seattle, Washington, USA
- 74 Colorado, USA
- 75 Meenalappa, Ireland
- 76 The Cliffs of Moher, Ireland
- 77 Istanbul, Turkey
- 78 Antalya, Turkey
- 79 Tunis, Tunisia
- 80 Doñana National Park, Spain
- 81 Svalbard, Norway
- 82 Oslo, Norway
- 83 Guatemala City, Guatemala
- 84 Tikal National Park, Petén, Guatemala
- 85 Midway Atoll, US Territory
- 86 Phnom Penh, Cambodia
- 87 Siem Reap, Cambodia
- 88 Pierce Landing, Maine, USA
- 89 Chamonix, France
- 90 Halifax, Nova Scotia, Canada
- 91 San Miguel de Allende, Mexico
- 92 Ushuaia, Argentina
- 93 Singapore
- 94 Paradise Harbor, Antarctica
- 95 Palm Beach, Florida, USA
- 96 Los Angeles, California, USA
- 97 Athens, Greece
- 98 Amsterdam, The Netherlands
- 99 Mount Fuji, Japan
- 100 Maeslantkering, The Netherlands
- 101 Stuttgart, Germany
- 102 Kiev, Ukraine
- 103 Chernobyl Nuclear Power Plant, Ukraine
- 104 Shanghai, China
- 105 Alaska, USA
- 106 Havana, Cuba
- 107 Berkeley, England
- 108 Bermuda Triangle, Caribbean
Attleboro, Massachusetts, USA
Because it is the home of Dan and Amy, and where many plot points happen, Attleboro appears in a massive number of books. These are The Maze of Bones, Vespers Rising, all books in Cahills vs Vespers, all books in Unstoppable besides Flashpoint, all books in Doublecross, and in Outbreak. Attleboro is a town located in southeastern Massachusetts near the border with Rhode Island, that was once known for its jewelry industry. This where Grace Cahill lived in her mansion, and where Dan and Amy's parents home once was located, however both were burned down in separate incidents. Dan and Amy currently live here in Grace's rebuilt mansion, and this is where the Cahill Command Center is located. In The Maze of Bones, Grace's funeral and will reading is held here, and her mansion is set on fire by the Holts. In Cahills vs Vespers, the Cahill Command Center is used by Ian, Sinead, and Evan Tolliver to help Dan, Amy, Jake, and Atticus during their jobs for Vesper One, and to search for the hostages. In Unstoppable, the Cahill Command Center is used off and on by Ian, Hamilton, Jonah, and Pony to help Dan, Amy, Jake, and Atticus search for the antidote ingredients, and to help coordinate the search for the three other ingredients with Online Cahill Agents. In Doublecross, for most of the series the Outcast has control of Grace's Mansion and the Cahill Command Center. This is also where he unleashes his anti-Cahill bees on a group of his followers in Mission Atomic. It is briefly seen at the start and end of Outbreak when Dan and Amy visit Grace's Mansion.
'Sconset (Island of Nantacket)
Nantacket is island off the coast of Massachusetts that is a popular beach and resort spot. Grace Cahill used to own a beach house here. Amy and Dan came here before Grace died.
Miami, Florida, USA
Miami is the largest city in Florida, located on the east coast of the peninsula. Amy mentions that she and Dan went here on a trip with their parents when they were young. She now suspects the trip to have been to search for clues.
Boston, Massachusetts, USA
Boston appears in the books: The Maze of Bones, Vespers Rising, The Medusa Plot, and Nowhere to Run, Flashpoint, Mission Hurricane, and Outbreak. It is the capital of the US state Massachusetts. It is where Beatrice Cahill lived, and where Amy and Dan used to live. This makes Boston a location that is mentioned or visited many times throughout the series. It is also the Headquarters of the infamous Founders Media.
Philadelphia, Pennsylvania, USA
Philadelphia appears in The Maze of Bones. It is the largest city in Pennsylvania and the home of the Liberty Bell and the Franklin Institute. It is where the explosion that caused Ted Starling to go blind, gave Ned Starling endless headaches, and where Sinead got large scars criss-crossing her arms occurred. It is where Amy and Dan found their partial clue, which is leading up to the first official clue they find (Iron Solute).
Paris appears in The Maze of Bones and The Medusa Plot. This is the first place Dan and Amy travel to that isn't in the USA. It is the site of a Lucian stronghold, the Eiffel Tower, and the first Clue, Iron Solute. It is also where Nellie Gomez got kidnapped in The Medusa Plot, by the Vespers.
Vienna appears in One False Note. It is the capital of Austria and is surrounded by mountains. Dan and Amy travel here in search of Mozart's clue. They visit his childhood home while they are here.
Salzburg appears in One False Note. Salzburg is the fourth largest city in Austria, and where Mozart was born. Dan and Amy follow Alistair Oh, and end up searching the Salzburg Catacombs while they are here. In A King's Ransom a group of tourists are mentioned to be from here.
Moscow appears in The Sword Thief, The Black Circle, and Mission Hindenburg. This city is the captial of Russia, and one of the largest Lucian strongholds was located here. In The Sword Thief, Amy and Dan touch down here, to refuel, before going to Tokyo. In The Black Circle, Dan and Amy visit the Lucian stronghold here. In Mission Hindenburg, Nellie Gomez and Sammy Moruad visit the Lucian stronghold to find out more information on Alek Spasky. Alek Spasky destroys the stronghold in this book. Nellie and Sammy also visit Vladimir Spasky in prison while they are in the city. NRR also lives here.
Tokyo appears in The Sword Thief, and The Medusa Plot. It is the capital of Japan and the largest city on Earth. It is where Amy and Dan found a hint leading to a Clue, and fought the Yakuza. It is also where the Jonah Wizard concert where Phoenix Wizard got kidnapped was located.
Seoul, South Korea
Seoul appears in The Sword Thief. It is the capital city of South Korea, and where the mountain that Amy and Dan find their third clue (Gold) is located. It also where the Oh Mansion, Alistair Oh's home, is located.
Cairo appears in the book Beyond the Grave. It is the capital of Egypt, and where the Great Pyramids are located. An Ekaterina Stronghold, built by Bae Oh, is located here. It is also where Hillary Vale lives, and is where Dan and Amy discover their fourth clue, Myrrh.
Luxor appears in Beyond the Grave. It is where the Tomb of Nefertari is located. It is also where the island that Dan and Amy are abandoned on that was filled with alligators is located.
Volgrorad appears in The Black Circle. It is where The Motherland Calls statue is located, and where the Battle of Stalingrad took place. It is the first location Dan and Amy are told by NRR to visit.
Saint Petersburg, Russia
Omsk appears in The Black Circle. Omsk is a city located in the remote Russian region of Siberia. The Holts visit here to help Dan and Amy with their hunt.
Road of Bones, Russia
The Road of Bones appears in The Black Circle. It is a highway in Siberia, Russia that caused the death of so many of its builders, that it gained the nickname "Road of Bones". The Holts visit here to help Dan and Amy with their hunt, and the Kabras chase them here.
Yekaterinburg appears in The Black Circle. It is where the Tsar of Russia, Nicholas II, and his family were murdered by Madrigals, but only Nicholas II's youngest daughter, Anastasia Nikolaievna Romanov, survived. It is the current location of the Amber Room, and is where Dan and Amy find their 5th clue, Amber. The Church of Blood, where the Amber Room is currently located, is under a Black Circle restriction, ordered by Vikram Kabra.
Sydney appears in In Too Deep. Sydney is the largest city in Australia and the home of the famous Sydney Opera House. This is where Dan and Amy's uncle Shep Trent lives. During the events of In Too Deep, Dan and Amy travel to Sydney to visit Shep Trent.
Coober Pedy, Australia
Coober Pedy appears in In Too Deep. This mining town is almost entirely underground. Dan and Amy travel here with their Uncle Shep to find a possible clue that Bob Troppo may have left behind in a mine shaft.
Jakarta appears in In Too Deep. Jakarta is the capital of Indonesia, and Krakatoa is located off the coast of the city. This is where Dan and Amy discover their 6th clue, Water. On a island located off the coast of the city, is where an abandoned, cancelled Ekaterina stronghold sat. This is where Isabel Kabra lit the fire that killed Irina Spasky.
Pretoria, South Africa
This is one of the locations in The Viper's Nest. This is one of the capitals of South Africa, and the namesake of the song "Marching to Pretoria". Dan and Amy visit the National Library of South Africa while they are here, and they learn that Grace donated many objects to their collection.
Johannesburg, South Africa
Johannesburg appears in The Viper's Nest. It is the largest city in South Africa. Dan and Amy briefly visit here on their way to Pretoria.
Witbank/Emalalenia, South Africa
Durban, South Africa
Durban appears in The Viper's Nest. Dan and Amy visit a Shaka Zulu museum in this city. A small town on the outskirts of Durban is where Shaka Zulu is buried. The location of Shaka Zulu's grave is also the location of a Tomas stronghold. This stronghold is where Dan and Amy discover their 7th clue, Aloe.
Madagascar appears in The Viper's Nest. Dan and Amy visit one of Grace's safe houses here. It is unknown where exactly in Madagascar this house is located. They stayed there to heal Dan from the Kabra's poison. This is also where they found out their true branch - Madrigals.
Bejing appears in The Emperor's Code. Beijing is the capital of China, and the home of many famous landmarks. This is where Dan and Amy end up getting split up. Jonah Wizard held a concert here. Amy and Nellie visit the Great Wall of China while they are here, the Great Wall being located only a short distance from Bejing.
Denfeng appears in The Emperor's Code. This is where the home of the famous Shaolin Monks, Shaolin Monastery, is located. Dan visits here with Jonah Wizard, and ends up training with a few of the monks.
Xian appears in The Emperor's Code. This is where the famous statues of Terracotta Warriors are displayed. Jonah and Dan sneak in to where they are held to try and search for clue, however they are attacked. This is also where Dan and Jonah split up.
Tingri appears in The Emperor's Code. It is the closest Chinese city to Mount Everest. Amy and Dan reunite here after both figuring out where they needed to go. This is where they charter the A-Star helicopter to take them to Mount Everest.
Mount Everest appears in The Emperor's Code. Mount Everest is the tallest mountain in the world, and is located on the Chinese/Nepal border. Emperor Puyi hid the Janus formula on the peak of this mountain. Dan and Amy visit the peak by helicopter. This is also where Dan and Amy figure out their 8th clue, Silk.
Nassau appears in Storm Warning. It is the capital of The Bahamas and is known for its beautiful beaches. Amy and Dan come to follow the path of Anne Bonny. Dan and Amy visit the fictional water park, Oceanus, while they are here.
Boucan Cay, Bahamas
Montego Bay, Jamaica
Montego Bay appears in Storm Warning. It is a city located on the north coast of Jamaica. Dan and Amy briefly spend the night here before traveling to Kingston.
Kingston appears in Storm Warning. This city is the capital of Jamaica, and the largest city in the country. This is the city where Lester worked, and met Dan and Amy, and the city where Miss Alice lives.
Spanish Town, Jamaica
Spanish Town appears in Storm Warning. This was the former capital of Jamaica, and where a monument honoring the Moores is located. Dan and Amy come here to find a clue within this monument.
Port Royal, Jamaica
Port Royal appears in Storm Warning. This city is on the end of a skinny peninsula and most of the old city is underwater due to a flood back in the 1800s. Dan and Amy visit a dig site to excavate the old city with Lester while they are here. Unfortunately this is also the location of the tragic accident that resulted in Lester Dixon's death.
Moore Town, Jamaica
Moore Town appears in Storm Warning. This city was founded by Moores, free slave freedom fighters. This is where Dan and Amy learn the truth of the Madrigals, Madeleine Cahill, and their Uncle Fiske. This is also where they learn their 9th clue, Mace, and the 6 known Madrigal clues. It is also where Nellie Gomez officially joins the Madrigals.
London appears in Into The Gauntlet, Vespers Rising, Nowhere to Run, and Mission Atomic. London is the Capital of England, and the home of the British Royal Family. The Kabra family mansion is located here. In the past, as seen in Vespers Rising, Luke Cahill worked here as an adviser to King Henry VIII. In Into The Gauntlet, all of the teams meet at the Globe Theatre in an attempt to find clues. In Nowhere to Run, Dan and Amy meet up with Ian, Jake, Atticus, Pony, and Jonah to plan their search for the antidote ingredients. Jonah also starts a flash mob at the London Public Library in this book. In Mission Atomic, Ian and Cara try to meet Dr. Peerless at Imperial College, however he is killed by Alek Spasky before they can meet. They stay at Ian's new apartment.
Stratford appears in Into the Gauntlet. It is was where Shakespeare was born and it is where he was buried. Dan and Amy both visit his childhood home and his grave in search of clues.
Cahill Island, Ireland
Cahill Island appears in Into the Gauntlet, and Vespers Rising. It is the ancestral home of the Cahill Family, and where Gideon Cahill and Olivia Cahill raised their family of 4, including Luke Cahill, Katherine Cahill, Thomas Cahill, and Jane Cahill. It is where the Cahill Mansion was, and where Gideon developed the serum. The island itself has odd properties that make it impossible to see from shore. In the early 16th Century the island was a part of Vesper territory, under the dominion of Lord Vesper. Some time after the island was abandoned, it became the main Madrigal stronghold, and home to the gauntlet that Grace Cahill made to unite the branches. In Into the Gauntlet, this is where the Clue Hunt ends with all the teams uniting to stop Isabel and destroy the serum.
Dublin appears in Into the Gauntlet, The Black Book of Buried Secrets, and Nowhere to Run. It is the capital of Ireland founded by Vikings. In Into the Gauntlet, Dan and Amy come here on the way home from The Clue Hunt. In Nowhere to Run, it is where Declan picks up Dan and Amy and takes them to Meenalappa.
Monaco appears in Vespers Rising. Monaco is a city state located on the Mediterranean Sea and surrounded by France. It is where Grace, Beatrice, and Fiske Cahill lived during the events of the Second World War.
Casablanca appears in Vespers Rising. Casablanca is the largest city in Morocco, and the location of the famous World War 2 battle that bears its name. Grace Cahill goes on a daring mission to rescue the Cahill Ring from the hands of the Vespers who hold it there.
Zurich appears in Vespers Rising. It is the largest city in Switzerland, and the home of many banks, including the one that Grace Cahill entrusted with Gideon's Ring. Dan and Amy go to Zurich to pick up this ring.
Zermatt appears in Vespers Rising. It is a skiing village located in the south of Switzerland near the Italian border. Fiske Cahill owns a cabin here, and it is the location where Dan and Amy first fought and evaded Casper Wyoming.
Florence appears in The Medusa Plot, and A King's Ransom. Florence is located in Tuscan Italy, and the home of many famous works of art. Amy, Dan, and the gang steal the 'Medusa' from a museum in Florence.
Lake Como, Italy
Lake Como appears in The Medusa Plot, and Mission Hurricane. Lake Como is a picturesque lake located in the Italian Alps. In The Medusa Plot, this is where Amy and Dan steal the real Medusa from Gregor Tobin. After the events of this book, Jonah Wizard fell in love with the beauty of the lake, and bought a home on the shores of the lake, which the Cahills stay at briefly during the events of Mission Hurricane.
Rome appears in The Medusa Plot, and briefly in Breakaway. It is the capital of Italy and the birth place of the famous Roman Empire. In The Medusa Plot, Dan and Amy visit the Coliseum while they are here, and find the Marco Polo manuscript in tunnels underneath it. In Breakaway, they briefly stop here on layover to Tunis.
Lucerne appears in A King's Ransom. Lucerne is a city located in the Swiss alps, and is filled with medieval architecture. Dan and Amy come to an auction house here to find or learn more about the de Virga map.
Basel appears in A King's Ransom. The city is located on the Rhine River and near the border with France. Dan and Amy stay at a safe house here to protect them while they search for the de Virga map. Dan also buys serum ingredients in town while they are here.
Neuschwanstein Castle, Germany
Neushwanstein Castle appears in A King's Ransom. It is a huge, fairy tale like castle located in the south of Germany. Amy and Dan go to Neuschwanstein Castle to learn more about Jane Sperling, and the de Virga map. It is also a Janus stronghold.
Prague, Czech Republic
Prague appears in A King's Ransom. It is the capital of the Czech Republic and filled with unique architecture. Dan and Amy come here to find the de Virga map. They meet up with Atticus and Jake Rosenbloom here. This is also where Atticus is kidnapped by Vesper 6.
Sedlec, Czech Republic
Sedlec appears in A King's Ransom. It is a suburb of Prague. It is home to the Sedlec Ossuary, a church made of bones, and that is where Dan and Amy visit while they are there.
Goreme appears in The Dead of Night. It is located in central Turkey and home to unique rock spires that jut out of the ground. This is where Amy and Dan rescue Atticus Rosenbloom after him being kidnapped by the Wyomings. It was the location of a Vesper base, and Luna Amato owned a home here.
Samarkand appears in The Dead of Night. It is the second largest city in Uzbekistan and was a huge center of trade as the silk road once came through here. Dan, Amy, Jake, and Atticus come here in search of a "Stale Orb". They visit the famous Ulugh Beg Observatory while they are here.
Heidelburg appears in Shatterproof. It is a small city in Southwestern Germany, and home of the famous university of the same name. Dan and Amy briefly visit here as their flight is diverted here because of a snowstorm.
Berlin appears in Shatterproof. It is the capital and largest city in Germany, and was once split in half, each side owned by a different Germany. Amy and Dan attempted to steal the Jubilee Diamond from the Pergamon Museum while they are here.
Pompeii appears in Shatterproof. Pompeii is a famous volcano that caused a famous eruption that destroyed the surrounding Roman town. Erasmus, Jonah, and Hamilton visit here to learn more information about volcanoes and the geologic power, and to follow Vesper Five.
Timbuktu appears in Shatterproof. It is located on the Niger River, and once was the home of the Mali Empire, which Mansa Musa, the richest man to ever exist, ruled. Amy and Dan visit here by order of Vesper One. Amy makes a promise to herself to donate money to the libraries here. Amy and Dan found "Apology for my Great Transgression." at some Roman ruins outside the city.
Mumbai appears in Shatterproof. It is the 2nd largest city in India, and is the home of the Bollywood industry. A Vesper base was located here that Erasmus, Jonah Wizard, and Hamilton Holt tracked Luna Amato to. The confrontation between them lead to the destruction of the base and the death of Erasmus and Luna.
New York City, New York, USA
New York appears in Trust No One, Day of Doom, Nowhere to Run, and Flashpoint. In Trust No One Dan, Amy, Jake and Atticus land here to await their next command from Vesper One. They return here later in the book to drop the manuscript page, and ring off to Vesper One. During this time Dan and Sammy Mourad created a small dose of the serum that Dan intended to use. In Nowhere to Run, Dan and Amy visit Sammy to see if anyone got a hold of the serum, and to visit Fiske. In Flashpoint Dan and Amy return to go to Sammy's lab to create the serum antidote, and use it on Fiske.
Yale University, Connecticut, USA
Yale University appears in Trust No One. It is one of the most prestigious colleges in the United States, and was founded before the USA was even founded. Dan, Amy, Jake, and Atticus visit here to take a look at the Voynich Manuscript. This is also where Sinead Starling is revealed to be the traitor.
Sao Paulo, Brazil
Sao Paulo breifly appears in Trust No One. Dan, Amy, Jake, and Atticus fly here to get on a plane to Foz do Iguazu.
Foz do Iguazu, Brazil
Foz do Iguazu appears in Trust No One. Located on the border with Argentina, this place is famous for a national park filled with famous waterfalls. Dan, Amy, Jake, and Atticus visit the waterfalls here searching for the missing manuscript page. Eventually they find it at Mabu Thermas Hotel and Spa where Dr. LaCher hid it from the Vespers.
Syracuse, Sicily, Italy
Syracuse appears in Trust No One. It is a seaside town located on the Italian island of Sicily. Jonah, and Hamilton visit here to go to Archimedes grave and to learn more about Archimedes himself.
Washington DC, USA
Washington DC appears in Day of Doom. It is the capital of the United States, and the home of the President. Amy and Dan follow Isabel Kabra through Washington DC, who leads them to the National Museum of Natural History, which they visit.
Chicago, Illinois, USA
Chicago appears in Day of Doom. It is the largest city in the state of Illinois and the 3rd largest city in the USA. Dan, Amy, Jake, and Atticus briefly stop here while on layover from their train. This is the city that Vesper One threatened with the Machina Fini Mundi.
Seattle, Washington, USA
Seattle appears in Day of Doom. Seattle is the largest city in Washington and the home of the Space Needle. Jonah, Hamilton, Evan, and Ian all come to a motel right outside of the city to rescue Phoenix Wizard. The Vesper base that the hostages where kept in was located in the Cascade Mountains outside of Seattle.
Colorado appears in Day of Doom. The main Vesper base is located in a unnamed mountain in this state. This base is where the Machina Fini Mundi was kept, and where Vesper One lived. It is the location of the final battle in Cahills vs Vespers and where Damien Vesper III, Isabel Kabra, Natalie Kabra, and Evan Tolliver meet their demise. The mountian ultimately collapses on the base as a result of the Machina Fini Mundi exploding.
Meenalappa appears in Vespers Rising, Nowhere To Run and briefly at the end of Flashpoint. Meenalappa is a fictional town located on the western coast of Ireland. This is where Olivia Cahill was born and raised, and this is where she lived with Madeleine after Gideon's death. The town has many landmarks that have secret Cahill and Madrigal connotations, like "The Madrigal Rock". This is where Bhaile Anois is located, which is the house that Olivia Cahill grew up in, and currently on of Grace's safe houses. Dan and Amy briefly stay here during Nowhere To Run.
The Cliffs of Moher, Ireland
The Cliffs of Moher appear in Nowhere To Run. They are the famous sea side cliffs that rise almost 702 feet above the sea, and are known for the famous Ailleen waves that are popular with surfers. Amy and Dan ride past by here in a boat while being chased by Pierce's henchmen.
Istanbul briefly appears in Nowhere To Run. Once known as Constantinople, this city is the capital of Turkey, and its largest city. Dan, Amy, and the rest of the Cahill group briefly stop here as a layover to Antalya, and meet up with Hamilton Holt.
Antalya appears in Nowhere To Run. It is a gorgeous seaside town located in southern Turkey. Dan, Amy, and the rest of the Cahills travel here in search of the whiskers of an Anatolian leopard. They travel to Mt. Ida in the Taurus Mountains, the location of a leopard sighting, and manage to escape Founders Media while finding the whiskers needed for The Serum Antidote.
Tunis appears in Breakaway. Tunis is the capital of Tunisia and the location of the famous ancient city of Carthage, a civilization that once rivaled the Roman Empire. Dan, Amy, Jake, and Atticus travel here in search of the Silphium seeds, and meet up with Jake, and Atticus's father. Jake and Atticus come back here later in the book to pick up the seeds.
Doñana National Park, Spain
Doñana National Park appears in Breakaway. It is a national park located on the southwestern coast of Spain, and believed to be the location of Tartessos, an ancient civilization. Dan, Amy, Jake, and Atticus visit Jake and Atticus's father at a dig site here. He finds the Silphium seeds here, but already sent them off for examination and preservation.
Svalbard appears in Breakaway. Svalbard is a group of islands located in the Arctic Circle, and the home of the Svalbard Global Seed Bank, which hold seeds of every known plant on Earth. Amy comes here alone to get the Silphium seeds. However, she is trapped by Pierce's goons and left to die. Right before she does, Dan rescues her.
Oslo appears briefly in Breakaway. Oslo is the capital of Norway, and the largest city in the country. Dan brings Amy here to recover from her trip to Svalbard. It is also where they meet back up with Jake and Atticus.
Guatemala City, Guatemala
Guatemala City appears in Countdown, and Flashpoint. It is the capital of Guatemala, and founded on a spot that where the Mayans once lived. Dan, Amy and the rest of the Cahills use this city to get to and leave Tikal. Jonah Wizard also accepts the key to the city here.
Tikal National Park, Petén, Guatemala
Tikal National Park appears in Countdown. This national park located in the middle of the Guatemalan rain forest is filled with Mayan temples and art. Amy, Dan, Jake, and Atticus hunt for the Riven Crystal to get one dram ground to a powder here, which they eventually find. Amy took the serum to save Dan from trouble while they are here. Unfortunately, while trying to save Dan from being kidnapped here, Pony is killed.
Midway Atoll, US Territory
Midway Atoll appears in Flashpoint. Midway Atoll is a United States territory, located in the middle of the Pacific Ocean, famous for the World War II battle of the same name. After arriving here with the Pierce kids, Cara lets Dan escape and Amy and Dan find each other.
Phnom Penh, Cambodia
Phnom Penh appears briefly in Flashpoint. It is the capital and largest city in Cambodia. The gang travels to Cambodia to find the venom of a Tonlé Sap Water Snake for the antidote. This is where they buy a boat to sail up river to Siem Reap.
Siem Reap, Cambodia
Siem Reap appears in Flashpoint. Located on the Tonlé Sap Lake, this city is home to the famous ruins of Angkor Wat. Amy, Dan and the Cahills visit these ruins and the surrounding parts in search of the Snake. This is where the Cahills first team up with Cara Pierce. The gang finally finds a Tonlé Sap Water Snake here and they capture it after a battle with Galt Pierce and his goons.
Pierce Landing, Maine, USA
Pierce Landing appears in Nowhere to Run, and Flashpoint. Pierce Landing is a fictional island off the coast of Maine, and is where the Pierce family lived. It is briefly shown in Nowhere to Run when introducing Galt, Cara and J. Rutherford Pierce. In Flashpoint, this is where the final showdown between Pierce and the Cahills ensues. They succeed in spewing the Antidote over the huge crowd causing Pierce and his goons to lose their enhanced abilities. It is unknown what happened to the island after J. Rutherford Pierce is arrested, as none of the Pierce family lives there anymore.
Chamonix appears in Mission Titanic. Chamonix is a ski resort town, located north of Mont Blanc, in the southeast of France. Dan and Amy are BASE jumping here when they are interrupted by the Cahills with news of the Outcast.
Halifax, Nova Scotia, Canada
Halifax appears in Mission Titanic. Located on the Nova Scotia Peninsula, Halifax is a huge shipping port and where the Halifax Disaster occurred, the largest explosion that was made without an atomic bomb. Amy, Dan, and the rest of the Cahills travel here believing the Outcast's poem was about the Halifax Disaster. They fight off Atlus and find out the poem isn't referencing Halifax while they are here.
San Miguel de Allende, Mexico
San Miguel de Allende appears in Mission Titanic. It is located in central Mexico, and is a cultural hub of art. Fiske Cahill has a home here, and Nellie Gomez and Sammy Mourad go here to meet with him and discuss their plans to stop the Outcast.
Ushuaia appears in Mission Titanic. Located in the south of Argentina, Ushuaia is sometimes called the Southernmost city in the world. Dan, Amy, and the rest of the Cahills come here to board and stop the maiden voyage of the Titanic II.
Singapore appears in Mission Titanic. Singapore is a city state located in South East Asia, that is known for its technological feats. Nellie Gomez and Sammy Mourad go here to meet with the Chen family and learn more about the Outcast, however they discover that the Chens are in league with the Outcast. The Starling Triplets lived here for a short time.
Paradise Harbor, Antarctica
Paradise Harbor appears in Mission Titanic. Located near the tip of the Antarctic Peninsula, this harbor is home to Deception Island and two research bases. Dan, Amy, and Hamilton come here following Dr. Jeff Tagamayer, who is in league with the Outcast. Dr. Tagamayer traps them in his study but the Cahills find a way out and are saved by Ian Kabra.
Palm Beach, Florida, USA
Palm Beach appears in Mission Hindenburg. Palm Beach is a resort town just north of Miami, and where many wealthy people have summer homes. Aunt Beatrice had a home there and that is where the Outcast cornered and killed her for knowing his true identity.
Los Angeles, California, USA
Los Angeles appears in Mission Hindenburg. Los Angeles is the 2nd largest city in the United States, and home to Hollywood and the entertainment industry. Jonah Wizard's main house is located here in Beverly Hills, and this is where the Cahills come to stay at the start of Mission Hindenburg. This is also where they intercept the message from the Outcast leading them to Athens.
Athens appears in Mission Hindenburg. Athens is the capital of Greece and the home of many ancient sites, like the Parthenon. Athens is where the airship race to the Karman Line was held. Dan, Amy, and the rest of the Cahills came here to try and stop the Outcast from causing an explosion during the race, however they failed and the Lucian sponsored airship blew up with half of the Lucian leadership on it.
Amsterdam, The Netherlands
Amsterdam appears in Mission Hurricane. It is the capital of The Netherlands and home to many canals and waterways similar to Venice. Dan, Ian, and Cara go to Amsterdam to try to stop the Outcast from creating a tidal wave targeted towards The Netherlands.
Mount Fuji, Japan
Mount Fuji appears in Mission Hurricane. It is the most famous icon of Japan, and located inside the mountain is the largest Tomas stronghold. Nellie Gomez and Sammy Mourad trek through winter storms to get to here to protect the base from an attack from the Outcast.
Maeslantkering, The Netherlands
Maeslantkering appears in Mission Hurricane. It is a huge dam that protects the city of Rotterdam from flooding and storms. Dan, Ian, and Cara come here to close the dam and protect the surrounding cities from flooding, which they are able to do, albeit while cutting it close and Dan almost getting himself almost killed.
Stuttgart appears in Mission Atomic. Located in southwestern Germany, Stuttgart is located in the Black Forest, and near the Rhine River. After the gang splits up in London, Dan, Nellie, and Sammy take a train to go to the Black Forest to find out more about Nathaniel Hartford, which passes through this city. Dan survives an encounter with Melinda Toth, falling into the Rhine River in the process, but ends up kidnapped right afterward by Nathaniel. Nellie, and Sammy end up exploring an abandoned lab where the Outcast once worked in the Black Forest. Sammy is severely injured by a mutant bear, but both of them escape with the information they needed.
Kiev appears in Mission Atomic. It is the capital of the Ukraine, and where modern Russia got its start. Ian, and Cara visit here to follow Alek Spasky. Ian, and Cara stay with one of Ian's Lucian contacts while they are here.
Chernobyl Nuclear Power Plant, Ukraine
Chernobyl appears in Mission Atomic. It was the location of the most deadly nuclear accident in history, and is still off limits to visit. Ian and Cara follow Alek Spasky here. Alek visits his wife's grave every year on her birthday, as she was killed during the disaster.
Shanghai appears in Mission Atomic. It is the second most populated city in China and has become a popular city to showcase new technology. Amy, Jonah, and Hamilton, come here because they suspect that the Outcast will strike here for his last disaster, as a Ekaterina convention is being held here. Amy and Alek Spasky stop Nathaniel's plan but Alex is fatally wounded by radioactive poisoning.
Alaska appears in Mission Atomic. Nathaniel Hartford owned a large greenhouse complex named "The Hive" in an unknown location in the Alaskan wilderness. This where Nathaniel developed the anti-Cahill bees that would erase any drop of serum with ones bloodstream. Dan is imprisoned and tortured for the ingredients for the serum here, and this is where he meets up with Amy, and Alek Spasky to defeat the Outcast. This battle ends with the deaths of Nathaniel Hartford, Alek Spasky, and all of the bees.
Havana appears in Outbreak. Havana is the capital of Cuba and home of its ruling Communist Party. It is where Sinead Starling unleashed the modified "Dancing Goat Pox". Dan and Amy come come down here to stop her and the spread of the virus. The other Starlings come down here to stop her as well.
Berkeley appears in Outbreak. It is located in southwestern England and where Edward Jenner, the creator of the first vaccine, was born. The Starling Triplets lived here in a lab/home while Sinead worked for Mr. West.
Bermuda Triangle, Caribbean
The Bermuda Triangle appears in Outbreak. Located in the somewhere within the Bermuda Triangle is largest, now abandoned, Ekaterina stronghold. Dan, Amy, and the rest of the Cahills, including Sinead, come here to create and receive the vaccine for the Dancing Goat Pox. They are attacked by Mr. West and his minions who try and steal the vaccine. All of the Cahills escape, besides Dr. Miller, who sacrifices his life to help the Cahills escape with the vaccine.