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Underground Worlds

Season 1
Underground Worlds returns for a second epic series, exploring the wonders hidden beneath our feet. The intriguing stories behind these extraordinary man-made spaces, natural caves, military bunkers and wonders of engineering are brought to life with spectacular footage from deep down below.
201910 episodes13+
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Episodes

  1. S1 E1 - Gibraltar
    July 7, 2019
    44min
    ALL
    New 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.
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  2. S1 E2 - Sweden
    July 14, 2019
    44min
    ALL
    Exploring 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.
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  3. S1 E3 - Switzerland
    July 21, 2019
    44min
    ALL
    Examines 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.
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  4. S1 E4 - Kingdom of Salt
    July 28, 2019
    44min
    13+
    The 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.
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  5. S1 E5 - Bouzincourt
    August 4, 2019
    44min
    13+
    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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  6. S1 E6 - City of Naours
    August 11, 2019
    44min
    7+
    Explores 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.
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  7. S1 E7 - Jersey War Tunnels
    August 18, 2019
    44min
    13+
    An 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.
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  8. S1 E8 - The Maginot Line
    August 25, 2019
    44min
    7+
    An 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.
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  9. S1 E9 - Edinburgh Vaults
    September 1, 2019
    44min
    7+
    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.
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  10. S1 E10 - Dover War Rooms
    September 8, 2019
    44min
    13+
    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.
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Details

More info

Content advisory
Violencesmoking
Audio languages
English
Subtitles
English [CC]
Directors
Jonny Leeder
Cast
Chris Jarmin
Studio
Phoenix Television
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