I know you are familiar with this picture of workers on the Brooklyn Bridge, taken in 1914 by Eugene de Salignac for the city of New York. But wait... why is the guy on the right so much bigger than the others? He's not. Rob at the What Is It? Blog altered the picture to make it an optical illusion!
A few weeks ago I saw this old picture on the web of the Brooklyn Bridge painters and thought it was perfect for the classic perspective optical illusion, I made an exact copy of the person on the left of the photo and placed it on the right.
Pretty neat, wouldn't you say? -Thanks, Rob!