A Sacred Spring with Two Cups
The less I say about this location the better. It is in Littleton, deep in the woods at the end of a path. As you walk you follow the edge of a swamp, and the verge of the water is continuously outlined by a stone wall. In the woods behind and to the side are other walls.

Finally the walls all converge at the head of the swamp where a lovely spring of water goes over a six inch waterfall. The water is cool and astringent. This site is still in use as a sacred location, because someone left two green plastic cups, suspended in the tree above the spring, and the trail ends here (the lower cup is slightly right and above center in the picture). If you magnify the picture you can see a bald spot in the moss of one of the rocks left of center. This is where you must step. As you stand over the spring to drink, other foot positions are outlined in the moss. If the persons using the spring read this, I hope they will forgive the intrusion.
 
 
 

Now, as you head back along the trail you notice a stone embrasure, isolated from other walls. Is this something for practical use: marking a corner where all other boundaries (we assume) are already marked with full stone walls? Or is this something else? We do not seek the answer very strenuously. And return to the car.