There's a cute app for the iPhone and iPad called Fast Fractal. I've been having some fun with it. These are digital designs rather than photos.
I think this one looks like something from Dr. Seuss:
I did some additional editing on the contrast on this one:
I'm thinking about using it as an etching pattern. The only downside is the images are small. I'm not sure how they'll print.
Here's a colorful one:
Check out my set on Flickr for more fractal designs.