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What is Secrets of the Underground about?
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.
Latest episode
S2 · Episode 8 — Quest for the Gold Rush Fortune · 2017-12-16
Millions of dollars of stolen Gold Rush treasure is rumored to have been stashed in a cave in Northern California. Rob Nelson and Stefan Burns use cutting-edge technology to search for the legendary treasure.
- Genres
- Reality, Documentary
- First aired
- 2017-02-14
- Rating
- ★ 5.4 / 10
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