9 Of The Coolest Underground Places In The World

10 Of The Coolest Underground Places In The World

Cappadocia Underground Cities, Turkey

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The Catacombs of Paris, France

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Wieliczka Salt Mine, Poland

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Cu Chi Tunnels, Vietnam

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Caves of Aggtelek Karst

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The Greenbrier Bunker, United States

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Icehotel, Sweden

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The Shanghai Tunnels, United States

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The Underground Basilica of Pio IX, Italy

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