When did Underground Worlds Season 2 Episode 6 air?
Underground Worlds Season 2 Episode 6 aired on February 14, 2022.
Underground Worlds
British documentary series exploring incredible feats of human endeavour underground, revealing what people have built, where they have built it, how and why.
Season 2 · Episode 6
Ireland's Underground Alcatraz
Feb 14, 2022·45m
Exploring hidden defences that have kept Cork Harbour, in Ireland, safe for over 400 years. Plus, a former submarine base in the fjords of northern Norway.
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How long is Underground Worlds Season 2 Episode 6?
This episode runs for approximately 45 minutes.
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