Ceremony, abomination, or....what?

Walking through the woods just east of Rt 495 and south of Rt 117. Further to the south this is a Bolton conservation land called Pine Hill, further east there is a camp called Camp Resolute; so there are plenty of opportunities for the "public" to be in these woods. But I cannot imagine someone randomly taking the time to lift these, pretty heavy, rocks up on top of an old washing machine.Briefly I thought this was the remnants of a house. But no, these are rock piles built on and inside of kitchen trash.
I saw this from a ways away and did not pay it any attention - figuring it was a dead car or something. Then I came right up to it later. In the foreground of the last picture, look how rocks are inserted into a cloth loop, draped over the top of that frame. No, someone built this. And it is about as far from the rock pile aesthetic as you can get, yet still, it makes me wonder.