The city may be the biggest in the world, officials say.
A 5,000 year-old underground city has been discovered in the Nevşehir province of Turkey’s Central Anatolia region, in the historical area of Cappadocia, central Turkey.
It could be the world largest underground city.
Cappadocia has a large number of underground settlement.
Cappadocia’s characteristic volcanic rock landscape lends itself to underground cities
Derinkuyu underground city, to the south of Nevşehir city
Ahmad Ali JetPlane 