Optical illusions are some of the most entertaining pieces of art known to man. The way that our eyes try to figure something out only to realize that it was something completely different than what we thought! The same applies to this specific optical illusion of this wall.
Most people have a really hard time finding it at first, but once they spot it, they still can’t really figure it out. Try and really outline the shape in the wall. Can you see what it might resemble? Some answers people have thrown out there is that it looks like a snake of some kind or a lizard.