The world’s top-secret tunnels and hidden passages
Alexandra Upton
23 April 2024
Discover the secrets behind these mysterious hidden passages
DANIEL LEAL / AFP via Getty Images
Capitol Hill tunnels, Washington, DC, USA
Associated Press / Alamy Stock Photo
Capitol Hill tunnels, Washington, DC, USA
Chip Somodevilla / Getty Images
Lynnewood Hall's underground labyrinth, Pennsylvania, USA
Abandoned Southeast
Lynnewood Hall's underground labyrinth, Pennsylvania, USA
Abandoned Southeast
Covert passage in the House of Commons, London, UK
DANIEL LEAL / AFP via Getty Images
Covert passage in the House of Commons, London, UK
ITV News
The Fishbones, Lyon, France
Abaca Press / Alamy Stock Photo
The Fishbones, Lyon, France
Abaca Press / Alamy Stock Photo
Kingsway Exchange Tunnels, London, UK
Peter Macdiarmid / Getty Images
Kingsway Exchange Tunnels, London, UK
BT Media Image Library via Getty Images
Festungsfront Oder-Warthe-Bogen, Międzyrzecz, Poland
Piotr Borkowski / Alamy Stock Photo
Festungsfront Oder-Warthe-Bogen, Międzyrzecz, Poland
Wojciech Stróżyk / Alamy Stock Photo
Passetto di Borgo, Rome, Italy
Ed Warner / Alamy Stock Photo
Passetto di Borgo, Rome, Italy
RealyEasyStar/Daniele Bellucci / Alamy Stock Photo
Secret entrance to the Knickerbocker Hotel bar, New York, USA
Pictures Now / Alamy Stock Photo ; Littleny / Alamy Stock Photo
Secret entrance to the Knickerbocker Hotel bar, New York, USA
ARMcgrath / Wikimedia Commons [CC BY-SA 4.0]
Tunnels of Củ Chi, Củ Chi, Vietnam
Beaconstox / Alamy Stock Photo
Tunnels of Củ Chi, Củ Chi, Vietnam
Robert Wyatt / Alamy Stock Photo
Marie Antoinette's secret chambers, Versailles, France
V_E / Shutterstock
Marie Antoinette's secret chambers, Versailles, France
CHRISTOPHE ARCHAMBAULT/AFP via Getty Images
Second World War tunnels in the Rock of Gibraltar, Gibraltar
Raimundo79 / Shutterstock
Second World War tunnels in the Rock of Gibraltar, Gibraltar
Sergio Rojo / Alamy Stock Photo
Secret supply tunnel in Predjama Castle, Inner Carniola, Slovenia
Roka / Shutterstock
Secret supply tunnel in Predjama Castle, Inner Carniola, Slovenia
Pavel Dobrovsky / Shutterstock
Initiation well at Quinta da Regaleira, Sintra, Portugal
LALS STOCK / Shutterstock
Initiation well at Quinta da Regaleira, Sintra, Portugal
Alexander Reshnya / Shutterstock
Escape staircase at Bran Castle, Transylvania, Romania
Dennis Jarvis / Flickr [CC BY-SA 2.0]
Escape staircase at Bran Castle, Transylvania, Romania
Dennis Jarvis / Flickr [CC BY-SA 2.0]
El Chapo's bathtub escape tunnel, Culiacán, Mexico
Gobierno de México
El Chapo's bathtub escape tunnel, Culiacán, Mexico
Tribune Content Agency LLC / Alamy
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