
Episódios
T1 EP.1 – Gibraltar
6 de julho de 201944 minNew discoveries reveal the secrets of a long-lost chamber with evidence of high-stakes espionage in a hidden subterranean city built within the Rock of Gibraltar.Assistir gratuitamenteT1 EP.2 – Sweden
13 de julho de 201944 minExploring 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.Assistir gratuitamenteT1 EP.3 – Switzerland
20 de julho de 201944 minExamines some of Switzerland's 300,000 subterranean bunkers, the creation of an entrepreneur in England that's shrouded in mystery, and a network of man-made tunnels deep beneath Slovenia.Assistir gratuitamenteT1 EP.4 – Kingdom of Salt
27 de julho de 201944 minThe Wieliczka Salt mine in Poland, some 327 metres deep, where the voids left behind from excavating salt have been transformed into extraordinary spaces, carved by hand.Assistir gratuitamenteT1 EP.5 – Bouzincourt
3 de agosto de 201944 minA 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.Assistir gratuitamenteT1 EP.6 – City of Naours
10 de agosto de 201944 minExplores an underground city beneath a forest in Northern France built to house 3000 people, an ice cave under Iceland's biggest glacier, and a subterranean power station in London.Assistir gratuitamenteT1 EP.7 – Jersey War Tunnels
17 de agosto de 201944 minAn exploration of 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 BCE.Assistir gratuitamenteT1 EP.8 – The Maginot Line
24 de agosto de 201944 minAn exploration of 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.Assistir gratuitamenteT1 EP.9 – Edinburgh Vaults
31 de agosto de 201944 minThe 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.Assistir gratuitamenteT1 EP.10 – Dover War Rooms
7 de setembro de 201944 minExploring the military headquarters built beneath Dover Castle during the Second World War, and Odessa's catacombs, possibly the largest tunnel network in the world.Assistir gratuitamente