Underground Worlds

November 2019
1:00:00

S1E8)

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.
1:00:00

S1E8)

4.0 1 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

S1E8)

4.0 5 x
New. 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

S1E7)

4.0 1 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

S1E7)

3.0 5 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

S1E7)

4.0 3 x
New. 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

City of Naours (S1E6)

3.0 3 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.
October 2019
1:00:00

City of Naours (S1E6)

4.0 2 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

City of Naours (S1E6)

4.0 4 x
New. 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

Bouzincourt (S1E5)

4.0 5 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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