Secrets of the Underground (2017) | Season 1

1 Capone's Escape Tunnels

• 2017-02-14
• 1h 0m

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2 Mystery of the Serpent Mound

• 2017-02-21
• 1h 0m

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3 America's Buried Massacre

• 2017-02-28
• 1h 0m

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4 Rocky Mountain Monsters

• 2017-03-07
• 1h 0m

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5 Great Lakes Bermuda Triangle

• 2017-03-14
• 1h 0m

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6 California's Hidden Doomsday

• 2017-03-21
• 1h 0m

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7 Secret History of the New World

• 2017-03-28
• 1h 0m

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8 American Stonehenge

• 2017-04-04
• 1h 0m

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