Göbekli Tepe. The function of the structures is not yet clear.
The most common opinion, shared by excavator Klaus Schmidt, is that they are early neolithic sanctuaries. Discovery[edit] The site was first noted in a survey conducted by Istanbul University and the University of Chicago in 1963. American archaeologist Peter Benedict identified it as being possibly neolithic[6] and postulated that the Neolithic layers were topped by Byzantine and Islamic cemeteries. The survey noted numerous flints. Derinkuyu Underground City. Derinkuyu Underground City is an ancient multi-level underground city of the Median Empire 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] Derinkuyu. Derinkuyu is a town and district of Nevşehir Province in the Central Anatolia region of Turkey.
According to 2010 census, population of the district is 22,114 of which 10,679 live in the town of Derinkuyu.[3][4] The district covers an area of 445 km2 (172 sq mi),[5] 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. Ancient Aliens — Episodes, Video & Schedule - H2 on History.com.