On a hill somewhere in RI are the three propped boulders of a "corner", which may have once been a Native campsite. At one end of the corner is a large boulder which looks like it toppled off an outcrop.
Here it is seen from the front, showing the cracked foot rock. Like many of these propped boulders, it has a rounded bottom surface.
The center propped boulder is 77 feet away. It forms a right angle with the two end boulders.
The third propped boulder is 156 away. Afternoon glare ruined the photo.
The first boulder shown is near the end of a long wall.
Sometimes I wonder if these propped boulders were used as boundaries in land transfers. In a few sites, walls run past them or end near them.