New York's Underground Societies | Cities of the Underworld (S2, E9) | Full Episode | History

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Today, New York is the biggest city in the country... but it's got some dark secrets in its past. It was founded by covert groups, overrun with gangs and mob bosses, and ruled by secret societies, in Season 2, Episode 9, "New York Secret Societies." #CitiesoftheUnderworld
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"Cities of the Underworld" descends below the streets of major cities such as New York, Cairo, London, and Tokyo to explore the remnants of subterranean civilizations left buried there.

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