Underground Worlds

Series 1
50:00

Series 1, Episode 10 - Dover War Rooms

4.0 0 x
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.
55:00

Series 1, Episode 9 - Edinburgh Vaults

4.0 0 x
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.
50:00

Series 1, Episode 10 - Dover War Rooms

4.0 0 x
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.
1:10:00

Series 1, Episode 9 - Edinburgh Vaults

4.0 0 x
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.
1:00:00

Series 1, Episode 8 - The Maginot Line

3.0 0 x
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.
1:00:00

Series 1, Episode 7 - Jersey War Tunnels

4.0 0 x
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 800BC.
50:00

Series 1, Episode 8 - The Maginot Line

4.0 0 x
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.
1:10:00

Series 1, Episode 7 - Jersey War Tunnels

3.0 0 x
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 800BC.
1:00:00

Series 1, Episode 6 - City of Naours

3.0 0 x
An underground city beneath a forest in Northern France built to house 3,000 people, an ice cave under Iceland's biggest glacier, and a subterranean power station in London.
1:00:00

Series 1, Episode 5 - Bouzincourt

4.0 0 x
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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