Optical Illusions

This is so clever, but you have to look hard at the pictures behind these...​

When this painter was tasked with covering a billboard in blue paint, he had no ​

idea that it would create such a stunning optical illusion. He's not turning the ​

billboard into sky; the colour of the paint just gives it the same hue.​

Looks like her legs are over her husband's shoulders...​

This eye is actually a draining sink... ​

A praying mantis, riding two sprouting ferns captured by Tustel Ico​