It is the largest excavated underground city in the world and stretches more than 85 metres below the surface.

Beneath the surface of Turkey lies Derinkuyu, an ancient underground city built to house 20,000 people. But why was it created, and who lived here? Join me as I explore its deep tunnels and ...

Early human beings lived in caves, and in Turkey, the ancient Derinkuyu Underground City could have sheltered as many as 20,000 people on at least eight levels extending more than 275 feet below ...

Nile crocodiles dig burrows as deep as 39 feet deep. The Paris Catacombs are 65 feet underground. The ancient city of Derinkuyu lies 279 feet below Turkey. The Greenbrier Bunker in W. Virginia is ...