Thsi site has some of the most remarkable optical illusions I've ever seen. Although it has a German URL, the site is in English.
http://www.michaelbach.de/ot/
Austin
Austin, that was really something.
Thanks for sharing.
Russ
These demonstrate some of the reasons that eyewitness testimony is not always reliable. These illusions have been set up to emphasize the effect, making it obvious. But the eye can be deceived without realizing it. The result is that sometimes we see things that are not there, and sometimes we don't see things that are.
Austin
Another optical illusion (http://boortz.com/more/optical_illusion.html)