As we hung around waiting for sunset at Grayton Beach, one of our friends pointed out the pattern in the sand of the drip lines from the deck boards. With the sun low in the sky, the light was right to see under there.
Such a nice geometric grid over the contour of the dune.
On the left of the picture above, you can see some animal tracks. I think I remember that those were bobcat tracks. (We saw a lot of tracks on this trip.) Anyway, these tracks went under the steps and through and out the other side.
It might be a fun place to set up a game web-cam.