Derinkuyu is a town and district of Nevşehir Province in the Central Anatolia region of Turkey.The district covers an area of 445 km2 (172 sq mi), and the average elevation is 1,300 m (4,265 ft), with the highest point being Mt. Ertaş at 1,988 m (6,522 ft).
Located in Cappadocia, Derinkuyu is notable for its large multi-level underground city (Derinkuyu Underground City), which is a major tourist attraction.The historical region of Cappadocia, where Derinkuyu is situated, contains several historical underground cities, carved out of a unique geological formation, and were largely used by early Christians as hiding places. They are not generally occupied. Over 200 underground cities at least two levels deep have been discovered in the area between Kayseri and Nevşehir, with around 40 of those having at least three levels.