S1 E8 ∙ The Maginot Line ∙
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.
All episodes for series 1 of Underground Worlds
S1 E1 · Gibraltar
Incredible feats of human endeavour, revealing what people have built, where, how and why.
S1 E2 · Sweden
Exploring Sweden's passion for subterranean spaces.
S1 E3 · Switzerland
A look at some of Switzerland's 300,000 subterranean bunkers built across history.
S1 E4 · Kingdom of Salt
The wonders of the Wieliczka Salt mine in southern Poland.
S1 E5 · Bouzincourt
A labyrinth of tunnels underneath a tiny French village.
S1 E6 · City of Naours
An underground city beneath a forest in Northern France built to house 3,000 people.
S1 E7 · Jersey War Tunnels
The underground bases built by the German army during the occupation of Jersey.
S1 E8 · The Maginot Line
The secrets of the largest subterranean fortress along France's border with Germany.
S1 E9 · Edinburgh Vaults
The sinister history of Edinburgh's underground vaults.
S1 E10 · Dover War Rooms
The military headquarters built beneath Dover Castle during the Second World War.
Space Shuttle: Triumph and Tragedy
Description: The inside story of NASA's iconic, reusable spacecraft.; Category: Engineering; 2 episodes available.
The Buildings That Fought Hitler
Description: This series looks at just some of the buildings that were designed to fight Hitler.; Category: Military & War; 8 episodes available.
The Architecture the Railways Built
Description: Tim Dunn explores the stunning architecture that lines the railway network.; Category: Engineering; 40 episodes available.
Guy Martin's World War 1 Tank
Description: The motoring fan builds a working replica of a First World War tank and drives it at a Remembrance Day parade.; Category: Factual Entertainment; 1 episode available.
Guy Martin's Lancaster Bomber
Description: The history enthusiast honours Lancaster bomber crews of the Second World War.; Category: Military & War; 1 episode available.
How Britain Worked
Description: Guy Martin recreates technical achievements of the 19th century.; Category: Engineering; 6 episodes available.
Guy Martin's Spitfire
Description: The history enthusiast joins the two-year restoration of a Spitfire that was buried in a French beach.; Category: Engineering; 1 episode available.
Cleopatra's Lost Tomb
Description: An archaeologist's explorations take her to a forgotten temple complex - could it be Cleopatra's lost tomb?; Category: History; 1 episode available.
England's Forgotten Queen: The Life & Death of Lady Jane Grey
Description: The story of the woman who was the de facto Queen of England and Ireland for nine days in 1553.; Category: History; 3 episodes available.
Yorkshire Steam Railways
Description: A behind-the-scenes look at the North York Moors Railway.; Category: Factual Entertainment; 9 episodes available.
Rise of the Nazis
Description: Series examining how Adolf Hitler and the Nazi's seized power in Germany during the 1930s.; Category: Military & War; 9 episodes available.
Railway Murders
Description: Investigating the most notorious murders ever to take place on the British railways.; Category: History; 6 episodes available.
