One of the best optical illusions ever

One of the best optical illusions ever

This is so cool! It's a weird negative print of a castle, and when you move the mouse over it, it shows the same scene as a black and white picture. Stare at a dot in the middle of the negative print for 15-20 seconds (they recommend 30), then move the mouse over it. It will show the black and white picture, but it will look like it's in full color! The illusion vanishes when you move your eyes. Just try it and see for yourself. It's really cool!