This is the kind of mammoth sprinkler you dreamed about every summer when you were a kid. A stone's throw away from the kids' playground, the ground-level fountain was made for carefree fun. It's a concrete hexagon about 20 feet wide with nine spouts built into the concrete. The Neptunian Nine rhythmically spray up water in a shooting pattern that changes every few minutes. One moment, you could be standing over a gentle, two-foot arc of water when a 30-foot jet of water suddenly sprays out, rearranging your swimsuit. Hang onto your trunks and get ready for another blast.