Check out these image images:
Squared Circle Poster as Millifiori
Image by cobalt123
Second of two images - this is from a photograph I took of the framed square circle poster produced by jbum a few years ago. He collected images from the squared circle group pool and made a large poster that looks like a glowing peach to me. See the original poster at: www.krazydad.com, It is sold out now, so I was lucky to get two of them at that time.
The previous image also plays with the same poster, this time a different section and focus. Each are done using a version of the Amazing Circle technique. Use a square selection, then rotate 180 degrees. Next, go to Filter>Distort>Polar Coordinates. You may like to use the options as set in default there, or go to the other option.
