This is Göbekli Tepe, standing structures in rings that are reminiscent of Stonehenge, but older and bigger. On a hill in southern Turkey, these boggle the mind in size and age, 11,600 years old.
The conventional wisdom is that people were hunters and gatherers, then settled in small villages to farm, then formed complex societies with some people on top ordering larger numbers of people around. To, for example, build temples.
But this structure and other evidence says, uh, no. That wasn’t how it was. Foragers built this thing, and foragers also settled in villages. Click the link above to read the whole story. It’s still mostly speculation, but fascinating.