Correct me if I'm wrong.
At various locations thru out the northern portion there are great earth mounds created by the now dead indains. The one that comes to mind is the great snake mound in Ohio. As i understand it you can only tell what it is from the air. Sounds famalair?
Don't you think? I always thought they were placed on the lines of confluence! It is known that ceremonies were held there. Personaly I always thought scraficing virgins was quite a waste. By George the spell checker works.

Hmmm almost pill time.

Davefair

I once lived in that area when I was a wee lad, here's what I know.
serpent Mound and other mounds(Miamisburg)-earthworks, slash pyramids in the area were probably built by the Hopewell People a group of Native American hunter-farmers etc...
You could tell it was a serpent from the ground, but probably looks more impressive from the air - like Nazca lines-shapes etc... also in the area of Newark Ohio secret Military stuff and of course UFOs. Especially during the 1973-75 UFO flap.