Optical Illusion Pictures

This is my collection of optical illusion pictures. All these pictures were found on the internet and I put them here for your viewing pleasure.

Math Problem This is one of my personal favorites and a lot of people can't seem to figure it out. <!-- Animal Illusion Pics click this picture to see more animal related illusion pics --> Color Difference Which color is the darkest : A or B ? These two squares actually have the same color. If you don't believe me, it's easy to see with the Colormania colorpicker. They both have colorcode #6B6B6B. Count the Faces How many human faces do you see in this picture ? More Count the Faces Skulls Cover from the Def Leppard album 'RetroActive' (photographer : Nels Isralson) Two prints by William Gillbert. Unknown Author Picture by Dali Impossible picture of an arch.