The action is nonstop at the Venice Beach Skate Park. The sounds of skateboards scraping and pounding concrete fill the air as skaters make their moves inside smooth bowls at the park, which stands as a monument to the rich skateboarding tradition in Venice and Santa Monica. The bowls are like the empty swimming pools where Z-Boys -- members of the local Zephyr skateboard team -- revolutionized the sport with their surfer-like moves in the 1970s.