These squares are actually the same exact color. Hold your finger over the boundary between the two shapes and see them change.

Cross your eyes and you should be able to see a familiar face.

Stare at this lady's nose for 10 seconds, then blink rapidly while looking at a light surface. Her face will appear in full color.

These cars look like they're different sizes...

but in reality they're all the same.

These dots seem to change color and orbit the center. But focus your eyes on a single dot - there's no rotating or color change at all.

Similarly, stare at the cross in the center and watch the blank spot.

This park in Paris looks like it has a giant 3D globe...

But it's actually completely flat.

Which orange circle looks bigger?

Surprisingly, they’re the same size.

Stare at the yellow dot. Then, move your head closer to the screen and the pink rings will rotate.

You won’t believe it, but the squares marked ‘A’ and ‘B’ are actually the exact same shade of grey.

This replica proves it...

Look at this swirling for 30 seconds and then look at the Inception photo.

The "Ames Room" illusion messes with our depth perception and is created by slanting the back wall of the room towards the camera and the ceiling downwards.

These yellow and blue blocks appear to move one after the other, right?

Slowly move your head towards image and the light in the middle will get brighter. Move your head away and the light will become weaker.

Stare at the center of the colored version, then wait for it to change to black and white.

All the dots on this image are white, but some appear black.

By manipulating the human brain and eyes, Brusspup is able to create amazing animations with nothing but a black card.

The dinosaurs’ eyes follow you wherever you go...

Akiyoshi Kitaoka uses geometrical shapes, brightness and color to create motion illusions. These images are not animated, but the human brain makes them appear so.

Using similar techniques, Randolph is able to create similar, more psychedelic illusions.

By layering multiple images on top of each other, photographers are able to create amazing two faced portraits.

Which way is this train moving? Look long enough or blink and your brain will change the direction.

Is the middle dancer spinning clockwise or counterclockwise? The answer is both.

Using clever design, artists like Ibride are able to create 3D art that look impossible.

Stare at the blinking green dot for a few seconds, and see what happens to the yellow dots...

This looks like a face mask, but look closer...

At first, they look like 3 attractive women...

The photograph of the Leaning Tower of Pisa on the right appears to lean more to the right. In reality, they’re identical photographs and the towers are parallel.

These horizontal lines appear to be sloping, but look long enough, and you’ll see that they’re parallel to one another.

These overlapping circles are actually perfectly round and don't touch at all - can you see past the illusion?

The water in Flathead Lake is so clear that it appears very shallow. Can you believe it's actually 370 feet deep?

This is a simple illusion, but very cool nonetheless.

This 3D painted room seems to contain a massive drop. Only the brave dare walk on it.

Cover the sides of the hallway with your hands and the animation speeds down, cover the middle and the animation speeds up.