I  really find Magic Eye Stereograms very interesting. Especially since it took me a little while to figure how to see the images inside.  Magic Eye Stereograms are optical illusions of depth created from flat, two dimensional image or images.  Basically they are 3D images inside another image.  I found the one above at www.vision3d.com.

There a few of methods used to view the 3D image in a sterogram.  Below is the method that I used. I find it very helpful.


This method for 3D viewing is called cross-viewing or the cross-eyed method. You aim your eyes so that the lines of sight of your eyes cross in front of the image. When you cross-view, the muscles inside your eye that control the focusing lens contract strongly and shorten.

For more methods visit here.  Here's a couple more...enjoy.