When visiting Acadia, I always make a stop at Little Hunters Beach, not to be confused with Hunters Beach, to enjoy both the view and the multi-colored cobbles to be found there. The tide comes in and out rustling all the rocks against each other and shaping them to nice smooth surfaces.
The taking of cobbles is forbidden, most likely punishable by law as is the case with everything found within a national park, but that doesn’t stop folks from making cairns and other arrangements. I don’t think what is in this next image is an arrangement. I found it in a rather difficult to approach location so doubt anyone grabbed these stones and placed them in the recess.
The colors contained in the rocks on this beach are lovely.