Optical illusions are among the most popular online challenges today. It is considered the simplest way to test an individual's attentiveness and visual prowess. Attempting optical illusion puzzles ...

A Reddit parent has left internet users scratching their heads with a mind-boggling game of hide-and-seek. Shared under the wildly popular “Find the Sniper” thread, the image looks like nothing more ...

In the past few years, the internet has given us The Dress, a photo of a mysterious missing leg, and this disorienting floor design. If you're still hungry for more, INSIDER rounded up a mix of ...