Inside the world of skateboarding there is a very real rivalry between two camps: street skaters and vertical skaters. Street skating is done on any surface or any structure found in the urban landscape, including parking lots, handrails, benches, or curbs. Vertical skating is performed on vertical ramps or other structures built specifically for the sport. Street skating came first, coming to light in the late 1970s in California with surfers executing dangerous stunts on the curved walls of empty swimming pools. There were no competitions with prize money, and skaters did not wear expensive designer duds. Street skaters considered themselves to be hip rebels, outside the mainstream.