The Derinkuyu underground city is a 2500-year-old ancient multi-level underground city in Turkey, extending to a depth of approximately 60m. It is large enough to have sheltered as many as 20,000 people together with their livestock and food stores
I appreciate the take I first heard from Hancock about ancient man's fixation on the heavens was due to what had wiped us out before... Perhaps many times.... This is one of the biggest I know of but there are other spots like this around the world
The Derinkuyu underground city is a 2500-year-old ancient multi-level underground city in Turkey, extending to a depth of approximately 60m. It is large enough to have sheltered as many as 20,000 people together with their livestock and food stores