On the solar powered mode, the fountain will run directly from solar energy; however, the pump will only work in bright and sunny conditions. To run on battery mode simply press the Battery On/Off button. | eBay!
Osmium is both the densest and the rarest element that you can dig out of the Earth. It's so hard that it's used (as an alloy) in places with constant pressure and wear, like the tips of fountain pens. One single cubic inch of this stuff weighs nearly a pound, and were you to somehow get a cubic foot of it, it would weigh over 1,400 pounds. Good luck with that, though: last year, the entire U.S. osmium production was only 165 pounds.
Campania Cast Stone Platia Garden Terrace Fountain. Only 15.25" w x 9.75" h, but I keep coming back to this fountain. I can imagine watching the water slip over the edge to the next level. Other colors are available.