Everyone knows what optical illusions are, and most people have probably seen many during their time online.

Optical illusions are images that are confusing at first glance. They contain some sort of image that doesn't make logical sense. They seem edited or faked at first, or they seem to contain something that isn't really there. They are confusing but very interesting to see and figure out.

Some optical illusions have become viral over the years, such as "The Dress," which took the internet by storm years ago.

Aside from the well-known ones, there are thousands of more confusing and illusion-like images out there. Reddit's "Confusing Perspective" is a subreddit where people can share the most visually confusing images they have either found or taken. This subreddit is full of surprises and will cause some contemplation and deep thought upon viewing.

Here are 25 images taken from confusing perspectives that are worth the mental gymnastics.