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

Derinkuyu is the largest excavated city in the world. Life underground was probably very difficult, the guide, identified as Suleman, told the outlet. The residents relieved themselves in sealed clay jars, lived by torchlight, and disposed of dead bodies in [designated] areas. The exact date the impressive city was built remains contested, but ancient writings dating back to 370 BC indicate Derinkuyu was in existence.