I think people who haven't visited southern england may not realize this, but stonehenge is just one of many rock-circle formations of various types. When we w

I think people who haven't visited southern england may not realize this, but stonehenge is just one of many rock-circle formations of various types. When we were there a couple years ago, nearby we visited one that encompassed an entire town and seemed to be 2-3 miles across. It was more impressive than stonehenge (in terms of effort) though in rougher shape than stonehenge. The unique thing about stonehenge is the rocks placed on top of other rocks. But rock circles are not unusual in that area. It reminded me a lot of the Yucatan in Mexico where there are a variety of pyramids of similar architecture at various sites (from Cozumel to Palenque to Tikal in Honduras) in a region. Or the mounds in the Louisiana area (also ancient constructions.)