Secret Underground Cities Architecture

Mustafa Bozdemir inherited a house in Derinkuyu, Anatolia, Turkey.  When he started doing some remedial work he found more than he was expecting, the entrance to an underground City that could house up to 10,000 people.  Originally built to evade invasions they had numerous entrances to the caves but only 3 to the city that could be easily secured against invaders.  The caves have been altered and added to, but it is estimated that they might have been built (c.1200 BC), making them over 3000 years old. We have included a video that gives you all the information, so we will just give you the highlights.  Anatolia is apparently well known for these underground cities and this particular one had all the amenities a city of this age, would have.  Sleeping quarters, kitchens food storage, livestock rooms, a school, bathrooms, tombs, a church, underground river and multiple air shafts.  Sources here and here.