I found out about these discoing water jets through two of my sorority sisters. The fountain in front of the Palau Nacional comes to life at dusk on the weekends and boogies to sounds of "Call Me Maybe," "Circle of Life," "Chariots of Fire," and many many more complete with light display. The Fountain was built in the 1920s for the international exposition in Barcelona, and revamped for the Olympics in 1992 but still uses most of it's original plumbing. The website I found said there was a show every 30 mins from 9pm -11pm. I knew it was going to be packed by 9pm so we tried to get there early with the fall back plan of hanging around until 9:30 or 10:00 to take advantage of better spots when people left between shows.
Only problem with that idea was that people didn't leave between shows. Over the course of three or four playlists we slowly were able to negotiate the crowds, throwing the occasional elbow, until we secured a clear vantage point. In the mean time I was careening my camera all over the place trying to capture the show without also highlighting somebody's bad-hairdo. In the end, we managed to escape the swarm of cranky, camera-welding spectators and trolling pickpockets with both our wallets and some good pictures.