Underground Worlds

  • : 2019
  • : 20
  • : 0
  • Yesterday
  • 19
  • Documentary Reality

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1x1
Gibraltar
Episode overview
25, 2019
Gibraltar is just 6.8 square kilometres in area, but the size of its role in WWII is immeasurable. Beneath its distinctive landscape lie no less than 55 kilometres of hidden tunnels and .. show full overview
1x2
Sweden
Episode overview
02, 2019
A look at 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. Also, .. show full overview
1x3
Switzerland
Episode overview
09, 2019
A look at some of Switzerland 300,000 subterranean bunkers built across history. The extraordinary creation of a local entrepreneur that's shrouded in mystery in Liverpool, England. And, .. show full overview
1x4
Kingdom of Salt
Episode overview
16, 2019
The Wieliczka Salt mine in southern Poland, some 327 metres deep, where the voids left behind from excavating salt have been transformed into extraordinary spaces, carved by hand.
1x5
Bouzincourt
Episode overview
23, 2019
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.
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City of Naours
Episode overview
30, 2019
An underground city beneath a forest in Northern France built to house 3,000 people, a ice cave under Iceland's biggest glacier and a subterranean power station in London.
1x7
Jersey War Tunnels
Episode overview
06, 2019
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 BC.
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The Maginot Line
Episode overview
13, 2019
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.
1x9
Edinburgh Vaults
Episode overview
20, 2019
A look at 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.
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Dover War Rooms
Episode overview
27, 2019
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.