Sometimes we find a riddle that really stumps us, and when that happens, it’s great to pass it along and see if anyone else can, for lack of a better term, “crack the code.”

Well, such a picture has recently appeared online… one where everyone involved is racking their brains and trying to figure out what the heck is going on. Test your ability to see what the majority of people miss.

The above image is a classic optical illusion that is just as difficult to understand at first glance.

The best thing about such optical illusions, of course, is that once you figure out how they work, you can never fall for them again.

This image conceals another image within itself. What do you notice when you look at it?

What, no frog? Is that a horse you see? Have you noticed both?

In the first two cases, we have some information for you. Although both are present in the picture, you may only be able to make one of them out.