This has to be the coolest face out of art I've ever seen.
I've seen a lot of illusions... but this one is really f'n cool:
CHOP CUP from :weareom: on Vimeo.
So freakin' cool. Although... I can't even solve a real one - much less one that isn't visually as obvious.
A Flickr user took the all the U.S. currencies with buildings on them and lined them up to the real ones in Washington D.C. Pretty cool!
Omni Brain loves these tricks of vision. Check out some more here.