Seeing is believing… until you see something unbelievable, like an optical illusion. By definition, optical illusions are images that differ from their impartial reality. Sometimes, the most popular illusions are those that simply require another perspective — and their secrets are actually hidden in plain sight.

Other times, no one can figure out the truth at all. Naturally, the Internet is chock-full of this sort of trickery. The following illusions may or may not have been staged, but one thing’s for sure: they’re definitely going to throw your brain for a serious loop.

1. Why do this woman’s feet look like they are pointed in the complete opposite direction from her body? She must be in pain, based on the expression she’s making…

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Some internet users have claimed that she has fake legs, while others said it’s simply a mirror trick. What do you think? The photo surfaced in 2015, and even after all that time, no one has found the actual answer!

2. How about this brick wall? Do you notice anything weird? Is anything sticking out to you that clearly shouldn’t be there? Remember, you have to look closely or you’ll miss it altogether. Okay, ready for the answer?

Well, it turns out there’s actually a lit cigar sticking out from between two of the bricks. Unless you’re really able to unfocus your eyes, there’s a good chance you didn’t see it. Don’t feel bad if you didn’t, though—most people missed it the first time!

3. Can you tell why this photograph of a woman’s legs is causing such a stir around the corners of the Internet? They may look oily, but take a closer look. They actually just have streaks of white paint on them, making them appear to be shiny!

4. This next one is definitely going to fool you. It might look like just a normal passenger seat you’d find in any modern vehicle. But do you notice something off about the pattern of the lines on the leather seat? Look closely…

Couldn’t find it? Here you go! This iPad has a cover very similar in appearance to the seat upholstery! The person who owns it had better be careful; if they leave it sitting on the seat like that, someone is bound to sit on it!

5. Let’s give this one a try. At first glance, you probably think you’re looking at a class of young girls sitting on a bench. But once you take a look at the children’s faces, you’ll notice that something is off. Do they all look pretty similar?

Well, there’s a reason that they all look so much alike, and no, they’re not a gigantic group of twins! It turns out there are actually only two people sitting in a mirrored room. Now that definitely makes a lot more sense!

6. Here’s one that was the subject of a huge debate recently. Do you notice anything strange about any of these women sitting on the couch? Focus your attention on the third woman from the left. Where are her legs?

Perhaps when the legs of these women are highlighted in separate colors, it’ll be easier for you to tell whose belong to whom! Clearly, there are the correct amount of legs in the picture—it’s just that the woman in the middle is hiding!

7. Notice something strange about this bench? It almost looks like these women are sitting on air, but how are they doing that without falling down onto the ground below? They must have some strong legs!

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8. This looks like your average picture of a girl in a bedroom, but there’s something strange about her. No, it’s not her seductive expression or what she’s (barely) wearing. Just look closely and you might notice it…

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Look at her fingers. How many do you see? There are five, but guess what—she’s definitely not biting down on her thumb. Since this picture first surfaced, many Internet sleuths have tried their best to figure it out. The most obvious theory is just some good photo editing.

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9. This optical illusion is just downright confusing. This man finally made it all the way to the Great Wall of China, but do you notice something different? Doesn’t it look like the Great Wall has flipped on its side? How did he possibly do that?

Take a look at the people in the background! You can easily see two visitors walking upright along the path. The man in the picture is actually just doing a sideways plank while holding himself off the ground horizontally. That’s some core strength right there!

10. At first glance, the picture of this woman kneeling on a bright red sheet seems harmless, but then you’ll notice her legs. Doesn’t it look like she has three of them? Can you tell what’s really going on here?

If you look closely, you can clearly see that she is simply holding a vase near her legs. The shape and color of the vase are so close to that of her tights that it makes it appear to be a third leg!

11. Can you match this couple’s faces to their bodies? Once you realize that the blonde-haired man is actually the one sitting in the computer chair and the girl is actually standing, it’s easy to see how everything became twisted in the process.

12. People can get pretty creative with depth perception and photography. It might look like a giant man is going to make a meal out of a woman while lying in the sun, but she’s actually just standing far enough in the distance. It’s a matter of perspective!

13. Horror flicks are really running out of good monsters, aren’t they? Wait one second… those women aren’t fleeing an attack from the dreaded pup, Paws! He’s running far ahead of them and perspective makes it seem like they are all the same size. 

14. At first glance, this photo could appear to be of a young woman showing off her toned midriff—but look a little bit more closely. She’s actually leaning onto a mannequin displaying a pair of jeans. 

15. Is that a giant furry turkey leg resting on someone’s bed? Yikes, think of the grease stains! Luckily, it’s actually just a very fluffy, grease-free cat who has made himself comfortable in a hilarious position. Don’t eat this chicken! 

16. While it may appear that a Criss Angel disciple is practicing levitation in the middle of the street, that’s merely a mind freak here. In actuality, the asphalt grease stain looks like his shadow, but rest assured, his feet are planted firmly on the ground.

17. Trying to figure out whether this girl is underwater or not can give you a serious headache. There are bubbles that indicate she’s breathing beneath the bright blue waves, but her un-tussled hair indicates she’s got two feet on solid ground.

18. How sweet! A large man with very tiny legs and backward ankles hugs his girlfriend. Or maybe he’s wearing shorts with an interior white pattern that matches his girls’ white pants, making it look like her legs sticking out of his shorts.

19. This might look like a two-headed dog, but don’t go calling the tabloids just yet! If you look closer you’ll see that it’s actually two different dogs. The one in the rear is just standing between his owner’s legs making his body difficult to see. 

20. This photo of a mother and child might look like it’s worth submitting to a “world’s oldest looking baby” contest, but really the young girl just has her head wrapped around her mother’s neck at a funny angle.

21. Hey, don’t just stand around taking pictures! Somebody help this guy! Oh, wait, he isn’t actually in any trouble. He was lying flat on his stomach when the photographer captured the moment and he flipped the angle to make it look like he was holding on for dear life!

22. This famous Russian statue is notoriously somber. That is until you see it covered in snow and it looks like the seated figure is cuddling a very happy white colored kitty cat. More statues should feature cats, don’t you think?

23. What can we say? Some fathers just have a very hard time letting go! While that might be true, the real story here is that this girl’s friend is around her shoulder in such a way to perfectly align with her dad’s outstretched arm!

24. This man has done the impossible: He found a centaur woman to not only love him and accept him for his two human legs, he got her to marry him, too! Okay, alright, it’s just a girl in a wedding dress riding a horse. But still—true love!

25. Proms can be pretty scary, especially when your date turns into a demon from the Underworld just seconds before picking her up! Actually, the girl in pink is just wearing a shade of bright white eyeshadow and blinking at the wrong time.

26. Who knew that hover boards exist and their sole purpose is to help beachgoers give speeches while keeping sand from their shoes? Actually, the shadow of the flag looks like the shadow of the speaking platform, making it look like a hovering sand skiff!

27. How many birds are in this picture? It looks like one, but then, look at all those legs! And wait, there are only 9 legs… Is one of the hiding birds one legged? Please send your top minds to help us figure this one out.