Scientist Rob Nelson investigates the strangest underground locations in the world.

Season 1, Episode 1 – “Capone’s Escape Tunnels”
Investigating rumors of a secret underground escape route used by the infamous gangster Al Capone; trying to uncover who or what built a vast landscape of earthen mounds in Washington state.

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Secrets.of.the.Underground.S01E01.iNTERNAL.720p.HDTV.x264-DHD
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Secrets.of.the.Underground.S01E01.HDTV.x264-RBB [P2P]
MP4 | AAC VBR | 320MB
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