Strange signs on Ruby Beach. These little piles are usually referred to as rock cairns. They are designed to mark trails in our national parks, often with very specific meanings. However, I've seen them in other places I love and love to photograph, particularly the side canyons in Death Valley, where they are obviously just for fun.
If you do a little Googling on the subject, the outdoorsy sites tell you not to do this. The purpose is to prevent people from getting lost. But there is no getting lost straight across the beach. These cairns on a huge drift log look to me like a system of antennas. Whom they communicate with is left to your imagination.