New York State department of Environmental Conservation (DEC) is seeking information regarding the destruction of nearly every rock cairn on Wright Peakin the Adirondacks. A rock cairn is a man-made stack of stones used for various purposes including landmarks to help navigate hiking trails lacking in trees. You might also encounter a rock cairn created to serve a s a memorial. Get our free mobile appOn Monday, September 15th, nearly every rock cairn on Wright Peak summit in the Adirondacks was destroyed. There is some confusion regarding rock cairn.