The Spinning Dancer

Here's the Spinning Dancer tani mentioned below:

She can spin clockwise or counter-clockwise depending on how you look at it.

Color Illusions

I stumbled onto this site with a fine example of the color illusion (not sure if that's the proper name). That led to the Spanish Castle picture, which led to this list of other pictures with the same illusion. Stare at the dot or one spot on the weirdo color pic, then mouse over the image to revert to black & white, but the photo will look like it's in color until you move your eyes! Very strange experience.

Also crazy, the Spinning Dancer.