Massive Ancient Underground City Once Housed 20,000 People
Many of us have fantasized about having a door in our home that leads us to a hidden world, but can you imagine a buried city laying just behind the walls of your house? In 1963, a Turkish man knocked down a wall in his basement only to discover the ancient 18-story underground city of Derinkuyu. At one time housing up to 20,000 people, Derinkuyu is one of the largest underground cities in the world.













































































