Derinkuyu is a underground city found in Turkey that held 20,000 citizens

Derinkuyu is a underground city found in Turkey that held 20,000 citizens
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The Derinkuyu underground city (Cappadocian Greek: Ανακού) is an ancient multi-level underground city in the Derinkuyu district in Nevşehir Province, Turkey. Extending to a depth of approximately 60 m, it was large enough to shelter approximately 20,000 people together with their livestock and food stores. It is the largest excavated underground city in Turkey and is one of several underground complexes found across Cappadocia.[citation needed] @Curionic

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