Trappenhuis (House of Stairs)

Escher, M[aurits] C. Trappenhuis (House of Stairs). Dated XI/51. Printed by Baaker Baarn, Holland, carrying copyright date of 1988, M.C. Escher c/o Cordon Art.

The creatures climbing up/down the stairs appear to be mechanical centipedes, except that they have only six legs, and the legs are humanoid.