There is a place in New Hampshire called "America's Stonehenge". It's basicly a semi-wooded area with large(not real Stonehenge large though) stones laid out to mark certain astrological events. In one spot there is what they claim might have been a sacrifical stone with a groove cut in it to let the fluids from the sacrifice drain off. I think it's a story for the tourists, but anyway....underneath this stone is a small room dug into the hillside, big enough for 3-4 people to stand in. We had driven to the area to go to a headshop, so we had some new pieces to try out. We smoked up in this little cave-like room, dark and damp, and tried to freak each other out with stories about the "sacrifices" that happened.

Peace