In Derinkuyu Turkey there is an underground city with 11 levels. It's able to hold 30-50 THOUSAND people. It has a wine cellar and stables for livestock. Each level has a huge rock circular door that can be shut from the inside to keep people out. It also has an air vent and pluming.
They say it was built/ dug in the 6th or 7th century BC. Thats a long time ago!
They say it was built/ dug in the 6th or 7th century BC. Thats a long time ago!













