Depending on how you look at it, this illusion looks like Ben Stiller or Beyoncé.
The Zoolander-Beyoncé photo is a variation of a simple optical illusion known as a "hybrid image."
If you focus on this image for about 30 seconds, it'll disappear completely.
This person's tattoo makes it appear like he has a giant hole in his arm.
What color is this dresser?
At first glance, this looks like a normal newspaper.
But look closer and you'll realize that it actually has a hidden "3D" kitchen.
Although you may see a bunch of swirling circles, this image is actually completely still.
Is this cat going up or down the stairs?
This photo of two people hugging confused the internet last year.
If you focus on the man's shorts, you'll figure it out.
Tiles A and B on this checkerboard are the exact same color.
Called the "checker shadow illusion," the effect has to do with the way our brains interpret color and shadow.
Is this shoe pink and white or teal and gray?
The shoe is actually pink and white in real life.
Is this dress blue and black or white and gold?
As you probably know by now, the dress turned out to be black and blue.
Here's another example of color constancy: these strawberries aren't red.
There are a total of 12 black dots in this image, but you can't see them all at once.
Can you find the cat in this photo?
Reddit users had a hard time finding the tan-colored cat, which blended in with the piles of chopped wood.
This wavy floor is actually completely flat.
Similarly, this carpet looks like it's full of giant sinkholes.
The horizontal gray lines in this image look slanted, but they're actually completely parallel.
Here's another example of the "café wall illusion."
When the image is blurred, you can see that the lines are indeed perfectly parallel and perpendicular to one another.
Can you spot something unusual about this Leonardo da Vinci painting?
The glass orb that Christ is holding doesn't distort light the way it should in real life.
There's a phone hidden somewhere in this picture.
Thanks to its floral case, the phone blended in perfectly with this patterned rug.
The neon blue lines make it appear like there is a light blue circle in the middle of this image, but the background is white throughout.
This photo of Kendall Jenner, Kylie Jenner, and Hailey Baldwin went viral earlier this year — but not for the reason you might think.
Kendall's left leg was hidden under the folds of her dress.
Despite what you may think, the gray rectangles under columns A and B are the exact same color.
Is this child underwater or not?
She's definitely not underwater — here's the proof.
The two orange circles in this image are exactly the same size.
Do these legs look oily or shiny to you?
The red lines in this image look like they're bending slightly outward.
In 2016, yet another photo of a "missing" leg stumped the entire internet.
People eventually figured it out.
The middle of these shapes look like they're tinted by the light orange outlines, but it's an illusion.
Can you spot something unusual about this seemingly ordinary photo?
All the faces in the background of the picture have been Photoshopped to be the same man.
The blue diagonal line on the left looks longer than the one on the right, but they're actually the same length.
The shapes in this photo are genuine mirror images of each other.
What's wrong with this photo?
There's a cigar hidden in the photo, wedged between the bricks.
The train track on the left looks bigger than the one on the right...
...but both tracks are exactly the same size.
Are these pits or sand dunes?
If you look at the photo upside down, the illusion disappears.