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Secrets of the Underground

2017

Secrets of the Underground

4.3

A search for an underground escape route said to have been used by Al Capone. Also: who or what built earthen mounds in Washington state.

Country
United States
Genre
Documentary
Released
14 Feb, 2017
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Capone's Escape Tunnels

Season 1 Episode 1

Mystery of the Serpent Mound

Season 1 Episode 2

America's Buried Massacre

Season 1 Episode 3

Rocky Mountain Monsters

Season 1 Episode 4

Great Lakes Bermuda Triangle

Season 1 Episode 5

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