Staircase knot

This strange composition of staircase reminds Möbius strip, but unlike Möbius strip this figure has two sides. So someone, who will try to rise this stairs, will continue rising infinitely returning to the starting point.

The sculpture also reminds one of the famous Escher's images "Knots". One of the them you can see below. This knot is also not a Möbius strip, because it has four sides.