Crop Circles?

We removed the above ground pool a few days ago. This is what was left. We are getting Blaine a trampoline for her birthday, which is the 29th. I am SO glad to be rid of the pool!! I was the only one that skimmed, cleaned or chlorinated it. It was a time sucker, and we didn't really use it all that much. Looks kinda like a UFO landed, eh?