Underground Worlds
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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.
IMDb 6.9201910 episodesX-Ray13+
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Episodes

  1. S1 E1 - Gibraltar

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    July 6, 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

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    July 13, 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

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    July 20, 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

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    July 27, 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

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    August 3, 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

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    August 10, 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

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    August 17, 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

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    August 24, 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

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    August 31, 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

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    September 7, 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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