Cool. New Hampshire has a number of ancient stone monuments, including one that is believed to function as a large astronomical calendar like Stonehenge. It dates back at least 6500 years BC, but early farmers took a lot of the stones, and the owner turned it into a carnival like atmosphere and 'enhanced'/rebuilt some of the structures back in the early 1900's. I think the current view among academics is that the site is a real ancient site used as a calendar/dwelling/religious site, but the place has been fucked with so much over the years by modern people that the real significance and meaning to the culture that originally made the site is now impossible to determine. It is certainly not outside of the local archeological context to have stone monuments, circles and petroglyphs in the area from the pre-European contact era. If the people who built it used it as a calendar, or if some enterprising farmer moved the stones to mimic Stonehenge isn't exactly clear at this point. Anyway, the site in Michigan being fucking underwater probably stopped a lot of the tampering aspects that plague these kinds of sites, but it ads a layer of significant complexity in investigating and preserving the place.
