Underground Marvels

Season 2

TV-PG
British documentary series exploring incredible feats of human endeavour underground, revealing what people have built, where they have built it, how and why.

10 Episodes

  • Hotel Bunker of the Apocalypse
    E1
    Hotel Bunker of the ApocalypseThe top-secret construction of a massive nuclear bunker remained concealed under a palatial West Virginia hotel for decades, and now, experts reveal how this vast subterranean structure was one of the most closely guarded Cold War secrets in US history.
  • Mystery of the Kentucky Cave
    E2
    Mystery of the Kentucky CaveThe longest known cave system in the world spans hundreds of miles beneath the hills of Kentucky, and containing prehistoric artifacts and ancient human remains, experts reveal a subterranean mystery that may have changed the course of U.S. history.
  • Cincinnati's Secret Caverns
    E3
    Cincinnati's Secret CavernsDeep beneath the streets of Cincinnati lies a network of deserted tunnels and caverns that contain a remarkable history of the city's origins, and now, experts investigate to reveal who built this underground labyrinth and why it was abandoned.
  • Buried Lab of the Black Hills
    E4
    Buried Lab of the Black HillsBuried nearly a mile beneath the Black Hills of South Dakota is a cutting-edge laboratory at the forefront of astonishing scientific research; experts reveal advancements engineers achieved more than a century ago that keep it operating today.
  • Ireland's Underground Alcatraz
    E5
    Ireland's Underground AlcatrazSubterranean military fortresses situated on the southern coast of Ireland have protected against enemy invasion for over 400 years, and now, experts investigate how this powerful stronghold transformed into a brutal and terrifying prison.
  • Subterranean Silo Survival
    E6
    Subterranean Silo SurvivalExperts investigate a decommissioned underground missile launch facility.
  • Italy's Subterranean Secret
    E7
    Italy's Subterranean SecretAn unprecedented landslide unveils a hidden world beneath a picturesque town in northern Italy, and now experts investigate this vast network of tunnels and passageways that stretch 300 feet underground to reveal the city's subterranean past.
  • Grand Canyon's Lost Treasure
    E8
    Grand Canyon's Lost TreasureDescending more than 200 feet beneath the Arizona bedrock lies the largest dry cave system in North America; experts explore this vast subterranean network to reveal the mysteries and undiscovered treasure that remain hidden within its walls.
  • Murder Raid Tunnels
    E9
    Murder Raid TunnelsExperts explore an extensive network of tunnels beneath Ramsgate, England.
  • Medieval Maze of Secrets
    E10
    Medieval Maze of SecretsA forgotten world of ancient underground passages and medieval engineering lies hidden beneath the town of Exeter, England; experts investigate and reveal how this ambitious tunnel system was the result of one of the deadliest epidemics in history.

 

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