The old saying goes, "seeing is believing", although sometimes even your eyes can be deceived.
Take, for example, this incredible Deus Ex-esque 3D geometric tattoo. You'll want to believe a big chunk has actually been taken out of his guy's shoulder, but it is in fact a simple optical illusion. Take a look below:
There is little details about where the tattoo comes from, however a commenter on FashionablyGeeky claims it was made by Tony Booth of Dabs Tattoo based in Southport, UK.