1. Water World, Federal Heights, CO
With 49 total attractions, including the theme park-quality Voyage to the Center of the Earth and Lost River of the Pharaohs rides, Water World is the Mt. Everest of waterparks. Visitors often require multiple days to ride each waterslide, and instead focus on the park’s various slide clusters. The Mile High Flyer water coaster shoots riders up and over hills. The Screamin’ Mimi shoots riders down a wheeled sled into a splash tank. And the recently added Warp Speed combines traditional tube slide action with a virtual gaming experience.