Escher’s Waterfall fountain

There are other “impossible constructions” you may have seen at science museums that when viewed at a particular angle play with perspective and trick the eye.

This would feature a zig-zag water aqueduct flowing away from the viewer’s vantage point and spilling into a waterfall. In the foreground, at the beginning of the aqueduct, you have a glass tube rising up out of the water, the top of which is aligned, from the viewer's perspective, with the waterfall in the background. It would pump water up to the top where it would fall back down over the glass therefore obscuring it. Basically the “running faucet floating in space” trick you see at finer roadside attractions everywhere.

This would look like the water is flowing off in the distance to a waterfall that's falling into a catch basin in the foreground that flows off into the distance to a waterfall...etc. in an impossible loop.

The rest of the structure would be built around it in the same eye fooling style that when viewed from a peephole at the right vantage point will trick the eye into seeing the impossible.

Bun me or fish-bone me as you will, but definitely check out the links.