Seb Przd is an incredible artist who makes his home on flickr. Seb specializes in manipulating photo panoramas to create images that will blow your socks off. In his “Little Planet” series, he makes stereographic projections from equirectangular images. Essentially he stretches extreme panoramas onto globes.
Seb also works with conformal mapping to create Escher-style photography. Feel like giving some of Seb’s techniques a shot? You can check out a few of his tutorials here.