When this image is flipped, it reveals a totally different picture.
Which can you see? Or can you see both an Eskimo and an Indian?
This square is actually perfectly drawn. It's the circles which make it look strange.
Can you see a young or old woman? Look closely, they're both there!
There are actually no black spots in this image...
Squares A and B are actually the same shade.
Is this image really moving?
How many legs does this elephant have?
Believe it or not, there are only two colors used in this picture!
How many 3D cubes can you see?
Looks like a normal triangle doesn't it? Well in fact, this would be impossible to construct.
This shape would be impossible to build.
These two parallel lines are in fact both straight!
Although it looks like both lines are of different lengths, they are in fact equal.
Are these lines straight and parallel? Believe it or not, but the answer is yes!