Anyone who can spot more than four faces hidden within the image ... Another tricky brainteaser features a gnarled tree but only those with high IQ can spot a sleepy cat hiding on it.

Have you ever looked at a picture for a couple of seconds, only to discover there's more to it than you see? Optical ...

But as the Metropolitan Museum of Art’s exhibition “Hidden Faces: Covered Portraits of the ... putti, a citrus tree and other symbols. In the crystal clarity of the oil technique and extreme ...

However, try to be a little more open and carefree in life. 4. Hidden faces in the tree trunk and leaves If you notice the ...