

Underground Worlds
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S1 F1 – Gibraltar
7. Juli 201944 Min.New discoveries reveal the secrets of a long-lost chamber with evidence of high-stakes espionage in a hidden subterranean city built within the Rock of Gibraltar.Prime-Mitglied werdenS1 F2 – Sweden
14. Juli 201944 Min.Exploring Sweden's passion for subterranean spaces, and how the nation has taken extraordinary precautions to protect itself - by excavating an astounding 65,000 nuclear bunkers.Prime-Mitglied werdenS1 F3 – Switzerland
21. Juli 201944 Min.Examines some of Switzerland's 300,000 subterranean bunkers, the creation of an entrepreneur in England that's shrouded in mystery, and a network of man-made tunnels deep beneath Slovenia.Prime-Mitglied werdenS1 F4 – Kingdom of Salt
28. Juli 201944 Min.The Wieliczka Salt mine in Poland, some 327 metres deep, where the voids left behind from excavating salt have been transformed into extraordinary spaces, carved by hand.Prime-Mitglied werdenS1 F5 – Bouzincourt
4. August 201944 Min.A labyrinth of tunnels underneath a tiny French village which contains mysteries from several historical eras, and a Welsh slate mine that has been given a new lease of life.Prime-Mitglied werdenS1 F6 – City of Naours
11. August 201944 Min.Explores an underground city beneath a forest in Northern France built to house 3000 people, an ice cave under Iceland's biggest glacier, and a subterranean power station in London.Prime-Mitglied werdenS1 F7 – Jersey War Tunnels
18. August 201944 Min.An exploration of the underground bases built by the German army during the occupation of Jersey, and a group of more than 20 underground cities in Turkey, one of which dates back to 800 BCE.Prime-Mitglied werdenS1 F8 – The Maginot Line
25. August 201944 Min.An exploration of the secrets of the largest subterranean fortress along France's border with Germany, and a look at how a unique precious mineral was discovered in Derbyshire.Prime-Mitglied werdenS1 F9 – Edinburgh Vaults
1. September 201944 Min.The sinister history of Edinburgh's vaults and the development of Helsinki's subterranean spaces. Plus, the impact of the building of Naples on the volcanic ground below.Prime-Mitglied werdenS1 F10 – Dover War Rooms
8. September 201944 Min.Exploring the military headquarters built beneath Dover Castle during the Second World War, and Odessa's catacombs, possibly the largest tunnel network in the world.Prime-Mitglied werden