"squared circle" pool on Flickr. I'm always looking for circles to square wherever I am and found a wealth of them while in Santa Barbara.
The picture here is a piece of the linoleum at Albertson's. I was standing there waiting for them to finish decorating Tom's birthday cake and when I looked down, I saw circles. I had my little camera with me and next thing you know, I was set up to create a squircle.