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Big Geek Daddy

Funny, Cool, and Interesting Videos

The Deepest Underground Structures

A fascinating look at the deepest underground structures that will leave you wondering how and why some of these structures were built. Depth is measured from the lowest point to the surface, not to sea level, so some of these are under mountains. Be sure to watch Ocean Depth Comparison if you enjoyed this video.

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Big Geek Daddy was created on Jan 1, 2006 and features Funny, Cool, and Interesting Videos.
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