Cappadocia which is unique in the world and is a miraculous nature wonder is the common name of the field covered by the provinces of Aksaray, Nevsehir, Nigde, Kayseri and Kirsehir in the Central Anatolian region.
The Derinkuyu underground city is an ancient multi-level underground city in the Derinkuyu district in Nevşehir Province, Turkey. Extending to a depth of approximately 60 metres (200 ft), it is large enough to have sheltered as many as 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.