Secrets of the Underground poster

TV SERIES

Secrets of the Underground

2017 • HD • TV-PG • 60min

RATING

10 Votes (5.4)

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Story

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 Language English

Genre Reality Documentary

Network Science

Production Science Channel

Credits

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