Wholesale Optical Illusions

Based on Pinna illusion (first visual illusion showing a rotating motion effect). At a glance, the swirls of tilted black-and-white squares create the perception of a spiral. Look more closely and you realize that the squares don't form a coil at all; they trace out four perfectly round, concentric circles. The cognitive dissonance between your overall impression of spiraling and your recognition of individual circles.