A mile's hike into Malibu Creek State Park is an old-fashioned water hole called Rock Pool. A ring of cliffs ranging from 20 to 50 feet high surrounds the deep, green water. On the weekends, the cliffs serve as a launching pad for brave cliff jumpers who practice their sport in front of crowds of wallowing onlookers. Other cliff-jumping spots might have higher cliffs or clearer water, but none match the lazy-day party vibe and jovial jungle atmosphere of Rock Pool. It's so deep in the woods that the park rules prohibiting cliff jumping (and public drinking) are ignored. The result is a sunny circus that you can join as an applauding audience member or, if you're fearless enough, as a high-flying performer. No pressure, though — you can always lie out on a rock and sun yourself like a happy seal. —Isaac Simpson
1925 Las Virgenes Road, Calabasas, 91302. (818) 880-0367, malibucreekstatepark.org.