Kelly Coats is an artist who created this weird wheel whose pretty little name is phenakistiscope, and makes the whole life of Michael Jackson move before your dazzled eyes in only a few seconds.
Interestingly, one of the simplest optical illusion has been built in various sizes allowing to see it out of a book or your computers screen. Real life sculptures, I mean. Francis Tabary made most of these.
This is an art installation where you may think that there is a swimming pool, but only the surface of the water is present as a glass roof on top of an empty swimming pool.
Source: 21st Century Museum of Art of Kanazawa by Leandro Erlich.
You may not have noticed it yet, but it is quite easy to miss completely the difference between two shades of a color, as is shown in the following video.