Deep underneath the Turkish region of Cappadocia, Derinkuyu, the world’s largest excavated underground city, stretches not upward toward the sky but deep into the earth. Discovered in 1963, the ...

The Derinkuyu underground city is a sort of gargantuan anthill, except made by and for humans—up to 20,000 of them at a time, in fact. The city descends 280 feet into the earth, divided into ...

Beneath the surface of central Turkey lies Derinkuyu, an underground city that could house more than 20,000 people—entirely hidden until the 1960s. Built into volcanic tuff, the city extends ...