Many of you have probably heard about the ancient city of Derinkuyu, which is located in Turkey and was dug underground about 3-4 thousand years ago. Derinkuyu has 8 tiers (floors) and goes to a depth of 60 meters. It was discovered by archaeologists in 1963 and still impresses historians.
However, Derinkuyu is not even the largest Turkish underground city in
terms of area. Not far from it is the city of Nivsehira, founded at
about the same time as Derinkuyu, and having both underground and
above-ground buildings. People still live in it (more than 67 thousand
people), and in ancient times, at least 20 thousand could accommodate
its underground part....<<<Read More>>>...