Nushabad (Persian: نوش آباد)[a] is a city in the Central District of Aran and Bidgol County, Isfahan province, Iran.

[2] The underground city of Ouyi (Noushabad), located 3 km (1.9 mi) north of Aran o bidgol, Isfahan province, is considered notable ancient architecture.

As Noushabad city is located in the central desert region of Iran, it experiences harsh weather.

One reason for this underground city being built is thought to be to offer an escape from the high daytime temperature of the region.

Furthermore, there were several other tricks that were used to resist against the enemies, for instance digging deep holes in the middle of the rooms and covering them with rotating stones that would fall down if anyone stepped on them.