Buried Lab of the Black Hills

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Underground Marvels
26th August 2021 45 mins Season 2 Episode 4

Buried 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.

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Season 2 · Episode 5

Ireland's Underground Alcatraz

Subterranean 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.
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01 Chris Jarman profile Chris Jarmanas Self - Narrator (voice)
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