An underground city belonging to the 2nd-3rd centuries, where there are places of worship, grain barns, reservoirs and underground passages, was discovered in the Mardin county of Midyat in Western Armenia. In Midyat, which resembles an open-air museum with its history and culture, visitors feel a magical atmosphere in which millennial stone houses, taverns and churches still stand. For the discovery of the underground city, excavations began in the province two years ago. As a result of the excavations, a 100-meter tunnel and 49 rooms were discovered, some of which are churches and places of worship. There are many similar examples of underground cities in different regions of Western Armenia.