The Spinning Dancer This famous optical illusion shows a silhouette of a dancer spinning. The trick is that depending on how you look at the image, the dancer can appear to be spinning clockwise or counterclockwise.
The Checker Shadow Illusion At first glance, the squares in the Checkerboard illusion look like they are different shades of light and dark.
The Impossible Triangle (Penrose Triangle) This optical illusion features a triangle that appears to be physically impossible. The "impossible triangle" is an object that looks like a 3D shape, but it's impossible to construct in real life.
The Ames Room Illusion The Ames Room is a distorted room that causes people or objects inside it to appear dramatically different in size, even though they are all the same size.
The Motion Aftereffect (Waterfall Illusion) The Motion Aftereffect happens when you stare at a moving object (like a waterfall) for a long time, and then look at something still.
The Blue/Black or White/Gold Dress In 2015, an image of a dress went viral on the internet because people saw it in two completely different color combinations: blue and black or white and gold.
The Rubin Vase The Rubin Vase is an optical illusion that lets you see either a vase or two faces in profile, depending on how you focus.