A Man Knocked Down His Basement Wall, Discovering Ancient Underground City That Housed 20,000 People (Video & Pictures)

A Turkish homeowner chasing his chickens through a hole in his basement during renovations came across an abandoned underground Turkish city that once housed 20,000 people. In an effort to recapture his escaping poultry, the unidentified man knocked down the wall in the 1960s to reveal a dark tunnel leading to the ancient city of Elengubu, known today as Derinkuyu.