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Turning giant Cold War missile silo into 50-ton-door underground home
46:29
Turning giant Cold War missile silo into 50-ton-door underground home
2.6M views3 months ago
YouTubeKirsten Dirksen
30 Hidden Underground Cities in America
18:36
30 Hidden Underground Cities in America
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YouTubeWorldspire
Why is there a Deep Pit in the Great Pyramid's Subterranean Chamber?
19:47
Why is there a Deep Pit in the Great Pyramid's Subterranean Chamber?
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YouTubeAncient Architects
Idaho modern oldtimer builds underground & solar $50 houses
24:16
Idaho modern oldtimer builds underground & solar $50 houses
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YouTubeKirsten Dirksen
Buried Secrets in Alaska | The Alaska Triangle | Travel Channel
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Buried Secrets in Alaska | The Alaska Triangle | Travel Channel
22.7K views4 months ago
YouTubeTravel Channel
Inside Hidden Caves: Canada's Underground World | Full Documentary | TRACKS
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Inside Hidden Caves: Canada's Underground World | Full Docume…
301.1K viewsJan 26, 2022
YouTubeTRACKS - Travel Documentaries
The Underground Megastructures Ancient Humans Shouldn’t Have Been Able to Build
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YouTubeCBS Chicago
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