Perfectly Stacked

I dropped our damaged vehicle at the body shop for repairs. I foolishly thought I could be done in a couple of days and wouldn't need a rental car. I was informed it would likely take a couple of weeks and so went to the rental car agency to see about transportation for the next few weeks. Problems ensued and I eventually rode my bicycle home to fix things using a computer rather than a cell phone. Stopped by the beach on the way where I saw these perfectly stacked rocks.