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 uncover ...

The 7.8 magnitude quake struck before dawn when people were sleeping, destroying almost 40,000 buildings and severely damaging about 200,000 others in Turkey ... the ancient city of Antioch ...