I've long been fascinated by this circle and have heard the stories about it being related to the Summer Solstice. I've wanted to go there for sunrise on the Solstice, but that hasn't worked out yet. A friend of mine is a professional geologist and has looked at my photos. He says that it is a) man-made and b) very, very old. I've looked around the mountain for other "signs" of carvings and finally found one which I don't seem to be able to upload here, but if anyone wants to see it, just PM me. A few years ago I sent the photo to an organization that tracks New England geological objects of interest, and the president said he was going to be in the Watervill Valley area and look into it, but I've not heard anything back.