#3 Optical Illusions
I don't know about rest of the world but I love optical illusions. They pose a challenge which is extremely difficult sometimes but fun to solve. The point is, you need to be immensely smart to spot the illusions.
This time, we are trying to take this a notch higher with making it a little more difficult to figure out. Check this out.

#2 Under 3 minutes
This isn't quite the same as the famous blue/black or white/gold dress incident that flummoxed the Internet over a year ago. This Brick Wall is far more difficult.
Checkout the image again. This time, look at it properly. See if you can find it. It took me 3 minutes to figure out the illusion. Beat me if you can.
Keep reading ahead to know the solution.

#1 The Solution
At first glance it appears we are looking at a normal wall with a simple small rock embedded between two of the red bricks. But it isn't the reality.
I bet you couldn't figure it out. If you did, comment your timings in the comment box. Let us see who is the smartest of all!