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

In the heart of Turkey lies Cappadocia, a region famous for its ... During the Cold War era, Beijing constructed an extensive underground city designed to shelter residents in the event of a ...

Not big on heights? Get a different perspective on Cappadocia deep in the Derinkuyu underground city, one of dozens of ...

The rock fortress of Uchisar Castle stands at Cappadocia's highest point. (Bob Sessions) The next day we toured another subterranean site, the Kaymakli Underground City, a sprawling labyrinth that ...