Waterfall is one of Escher’s most iconic buildings. Escher corrected those who thought it was a perpetual waterfall, Escher said the miller “needs to add a bucketful of water from time to time to compensate for loss through evaporation.”


Like Ascending and Descending, this image is derived from the Penrose triangle.


Escher writes Waterfall “is composed of square beams which rest upon each other at right angles.  If we follow the various parts of this construction one by one we are unable to discover any mistake in it.  Yet it is an impossible whole beca