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.
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 E3 · Switzerland
A look at some of Switzerland's 300,000 subterranean bunkers built across history.
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 E10 · Dover War Rooms
The military headquarters built beneath Dover Castle during the Second World War.
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 Lancaster Bomber
Description: The history enthusiast honours Lancaster bomber crews of the Second World War.; Category: Military & War; 1 episode available.
Guy Martin's World War 1 Tank
Description: Guy builds a working replica of a WWI tank and drives it at a Remembrance Day parade.; Category: Factual Entertainment; 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: Guy joins the two-year restoration of a Spitfire that was buried in a French beach.; Category: Engineering; 1 episode available.
Forbidden History
Description: Jamie Theakston investigates incredible tales from the annals of history.; Category: History; 11 episodes available.
Hitler's Supercars
Description: The rise of Nazi Germany's speed record cars of the 1930s.; Category: History; 1 episode available.
Mega Metro
Description: An international team works on Australia's biggest ever tunnelling project in Sydney.; Category: Engineering; 8 episodes available.
Churchill's Bid to Abolish Britain
Description: This ambitious, striking film challenges our understanding of the Second World War.; Category: History; 1 episode available.
Smoke & Steel
Description: Examining the Industrial revolution - the age of smoke and steel.; Category: Engineering; 6 episodes available.
Great British Landmark Fixers
Description: Teams across the country are keeping our heritage standing, these are our landmark fixers.; Category: Engineering; 6 episodes available.
