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Episode 1: Capone's Escape TunnelsEpisode 2: Mystery of the Serpent MoundEpisode 3: America's Buried MassacreEpisode 4: Rocky Mountain MonstersEpisode 5: Great Lakes Bermuda TriangleEpisode 6: California's Hidden DoomsdayEpisode 7: Secret History of the New WorldEpisode 8: American Stonehenge
Secrets of the Underground
4.3/10
Seasons: 2
Country:US
Overview:
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.
Seasons
2
Episode Runtime
60 Minutes
First Air Date
2017-02-14
Rating
4.3
Production companies
Science Channel
Genre
Reality, Documentary
