Has anybody been to any of the large moundworks in the state? I had a chance to go to the Great Circle mound in Heath a few weeks back, and it was interesting. It definitely seemed to be a highly charged environment. Also, the two people I was with and myself all would hear something behind us take a step or two, but we would turn around and there would be nothing there (this was while we were 50+ yards apart).
Any interesting observations or experiences at these places?