There are two hundred underground towns in Cappadocia, Turkey, a province smaller than Connecticut, extending down into the earth as far as 250 feet with multiple levels that supported a population of thousands, with ventilation, irrigation, storage areas, and even areas for cattle. They'v been around for at least 2400 years and you can even go walk around in a few of them if you want! Who built them? When? That's where things get fuzzy.
