Can you believe your eyes? Click on the thumbnails to see descriptions and larger images:
The tiles illusion features in San Francisco’s Exploratorium. I think I’d feel a bit strange walking around in this bathroom – how about you?
Bathroom Wall by jenlund 70 on flickr. Used under Creative Commons licence.
black-dots, dot-haze, blue-red-circles and black-white-tiles drawn by Lois Lindemann, based on a well-known optical illusions and licensed under a Creative Commons Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales License