Discovered by accident in 1963, when a resident knocked down a wall in his basement to reveal a hidden passageway, Derinkuyu was soon recognized as an architectural marvel. The city features an ...
The Paris Catacombs are 65 feet underground. The ancient city of Derinkuyu lies 279 feet below Turkey. The Greenbrier Bunker in W. Virginia is 720 feet underground. It was built to keep Congress ...
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