Optical illusions that will astound you
Depth perception: This picture challenges your perception of depth.
Day and Night' (1938): M. C. Escher, a well-known graphic artist, is renowned for his art that portrays optical illusions.
What can you see: What do you perceive in this image? It could be a tree or the outlines of two faces.
Unsolvable box: The impossible cube, another mind-bending creation by Escher, may first appear as a perspective drawing.
Penrose stairs: This impossible staircase, created by British psychiatrist and mathematician Lionel Penrose.
Impossible tribar: The impossible tribar was initially conceived by Swedish graphic artist Oscar Reutersvärd.
Two or three: The Devil's Tuning Fork is an illusion created by D.H. Schuster in 1964.
Moving snakes: The Rotating Snakes illusion, created by psychology professor Akiyoshi Kitaoka.
Ilusory motion: This image, though it looks like it's moving, is actually completely still.
Ilusory motion: The motion occurs due to the arrangement of shapes and different colors.