The people who built it were hunter-gatherers — no writing, no metal tools, no wheeled vehicles, no settled communities.
They were not supposed to be capable of this.
The site covers at least twenty-two acres. Ground-penetrating radar has identified a minimum of
twenty stone circles, most still buried. Excavated enclosures contain T-shaped limestone pillars
up to six meters tall and weighing up to twenty tons, arranged in precise rings with two larger
central pillars facing each other.