Somewhere in northern Rhode Island is a small hill with a cliff face on its south side.
At the base of the hill is a 200-foot long wall with a wider leg about 60 feet long. The wider section makes almost a 90 degree angle with the long wall. At the other end of the long wall is a large pile of rocks, as if someone was building and stopped.
Here is how the site may have looked at winter solstice long ago. The shadow in front of the cairn is that of the viewer. When painting this site, I realized that one disadvantage of a small enclosure is that it would have been covered with snow. A simple solution would have been to leave a pole standing at the enclosure.