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Discovery .ScienceTue 27 Oct · 05:00–06:00News & Documentary

Secrets Underground

Mystery Of The Serpent Mound

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Rob Nelson investigates mysterious tunnels under Denver's airport. Plus, in Ohio he tries to uncover the secrets of a giant serpent-shaped mound.

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Secrets UndergroundLegend Of The Nazi Gold · Discovery .History · Tue 27 Oct, 21:00–22:00›Secrets UndergroundAmerica's Buried Massacre · Discovery .Science · Wed 28 Oct, 04:00–05:00›Secrets UndergroundRocky Mountain Monsters · Discovery .Science · Wed 28 Oct, 05:00–06:00›Secrets UndergroundCalifornia's Hidden Doomsday · Discovery .Science · Wed 28 Oct, 13:00–14:00›Secrets UndergroundDiscovery .Science · Wed 28 Oct, 14:00–15:00›Secrets UndergroundKing Solomon's Treasures · Discovery .History · Wed 28 Oct, 21:00–22:00›Secrets UndergroundGreat Lakes Bermuda Triangle · Discovery .Science · Thu 29 Oct, 13:00–14:00›Secrets UndergroundTesla's Final Secrets · Discovery .History · Thu 29 Oct, 21:00–22:00›

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