A questionable site southwest of Bellevue Cemetery - Harvard, MA

This site isn't going anywhere so I think it is OK to mention it's location. Also, I was perplexed about how ceremonial this was since the rocks seemed dumped pretty un-ceremoniously. Also there was a quarried outcrop fifty yards a way as well as a colonial stone bridge. So this area got plenty of non-ceremonial traffic over the years. On the other hand the site is a slope running down to a wetland, with a view to the southwest in a spot which is charming. Here is another poor-quality video clip: