I was recently in Florida with my family. We went to watch the sunset at a beach called 'Lovers Key'. Way down on the end was a group of uprooted trees that had been drying out in the sun for a long time. One of them had fallen over and the roots were sideways. When you got closer you could see little shells hanging on the tiny root bits. Maybe it happened by itself, but I don't think so. It looks like people have been contributing to this peice of natural artwork for awhile, so I took a few pictures and then added a few shells. Enjoy.