Derinkuyu, the mysterious underground city of Turkey

In 1963, an inhabitant of Derinkuyu (in the region of Cappadocia, central Anatolia, Turkey), knocking down a wall of his house cave, discovered amazed that behind it was a mysterious room that he had never seen, and this led him room to another and another and another to it ... By chance he had discovered the underground city of Derinkuyu, whose first level could be excavated by the Hittites around 1400 BC.

Via Fark.