Derinkuyu underground city

Derinkuyu (Turkish pronunciation: [derˈinkuju]) also known as Elengubu, is an ancient multi-level underground city near the modern town of Derinkuyu in Nevşehir Province, Turkey, extending to a depth of approximately 85 metres (280 ft). It is large enough to have sheltered as many as 20,000 people together with their livestock and food stores.

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