Uphill battle (of water and gravity)
Inventor make an M.C. Escher-like garden waterfall - where the water appears to travel uphill.
But if you want to build it yourself, beware - it's (presumably) patented. Silly, because I guessed (correctly) half of the antigravity feature before I saw the diagram. Isn't a patent supposed to be non-obvious?
Besides, water parks already make water run uphill. In the trough of a tubular water slide, jets push the water and the swimmer up a short section. The swimmer needs momentum, but the water does move against gravity.