Dude, zoom in. It's a freaking pond. Editing to go a bit farther. Boat in the desert? Why. Who fucking knows. But if you zoom in so that you can see that it is a pond, my guess is it is that shape because the pointed section is a boat ramp. Why? Once again, who the fuck knows, but you are freaking people out about a pond. And the empty circle? It's an old farm, look at the area, all the farms are circles because that is how the motorized irrigation systems work.