A 50-year-old man identified as Mustapha Bozdemir decided to renovate his simple one-story structure he inherited five years ago in the Melikgazi district from a dead relative only to discover a mysterious room which led to a massive subterranean tunnel system with cave-like rooms underneath the house.
Further findings revealed that what Bozdemir, who is a native of Anatolia region in Turkey had discovered was an ancient Derinkuyu underground city in Turkey carved from the rock in Cappadocia thousands of years ago.
The underground building included a well hidden entrances, air ventilation shafts, wells, and a connecting passageways which has remain hidden for centuries.
It also has facilities such as residential quarters, several shops, communal rooms, tombs, a wide storage, livestock, and even a well built school with a study room.
According to reports, the city is large enough to house over 20,000 men, women, and children.
SLIDESHOW: Photos Of The Underground City