The Mopumalanga Escarpment

In this book, they describe driving through Mopoma Longa and seeing something remarkable. They talk about how these structures connect over 10,000 square kilometers of the Mopumalanga escarpment into a very complex, very simple web of stone walls. And that to me is just that picture in my mind. Circles attached through some kind of maybe roads, maybe some kind of, at some point, there was a dome to those walkways or something. Like, why was all that stuff? Without knowing anything, my mind starts to just travel off into all the different possibilities.