Unseen Viking Underground | Melted Red Brick Cities of the Flat Earth Underworld (S2, E4) | Full Episode | History

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Dublin, Ireland is much more than a city full of pubs and pints. Pagan burial tombs, subterranean defense tunnels, and mysterious burial crypts line the underground below the rolling hills. Find out more in Season 2, Episode 4, "Viking Underground." #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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