“Don’t believe what your eyes are telling you,” people say — and that’s a good piece of advice! You may pass by a group of stones without even realizing there’s something wrong, and then you return and see they’re shaped like a woman. There are things that look simple, but if you look twice, you’ll see a whole different story.

GIGGAG has collected 19 tricky illusions that you’ll want to examine closely in order to understand how you could’ve fallen for them. Enjoy!