The Strange Staircase

This is an impossible staircase. Look closely at where the person going up, the person going down, and the cats are. The way they are positioned creates a sense of confusion—where does the staircase begin, and where does it end?

An impossible object like this one is a shape that can be drawn on paper but cannot exist in real life.

Famous impossible objects include the Penrose Triangle, the Penrose Staircase, Escher's Waterfall, and the Blivet.