In a wildlife refuge in northern Rhode Island is this large outcrop with a projecting slab. It is hard to tell if it was meant to point at anything, since the view is now blocked by trees.
I took a compass bearing, 137 degrees, and then drew a line with this bearing on my topo map. The next time I visited the refuge, I took the coordinates of prominent structures and plotted them on the map. This one was right on the line, about 1300 feet away.
It consists of an oblong boulder about 8 feet long, propped at both ends, and a large split boulder. This structure stands on a hill overlooking a brook and swampy area. The bearing of the boulder's long axis is163 degrees. If it was meant to align to another structure, it is probably lost to development.
Underneath the oblong boulder are some stones that might be donations.
The pointer and this structure may be related to each other as fertility symbols, the pointer being male and the split boulder female. Here is my imagining of the boulders on a late spring evening.