River Cairn

Beautiful and delicately stacked cairn along the shore of North Mills River.  Here's the wiki for the uninformed:  Cairn: A cairn (carn in Irish, carnedd in Welsh, càrn in Scots Gaelic) is a human-made pile of stones, often in conical form. They are usually found in uplands, on moorland, on mountaintops, or near waterways.
Of course we took good care not to knock it over and were so inspired, we built a few of our own from the excellent supply of river rock there.  In case you find one in the woods, by a river on top of a mountain, etc.; here are your instructions:  It is traditional for each person passing by a cairn to add a stone, as a small bit of maintenance to counteract the destructive effects of severe winter weather. Often the habit is to only add to the top, and to use a smaller stone than the previous top stone, resulting in a precarious stack of tiny pebbles.