The Waterpark Capital of the World! 💦 Would you visit? Wisconsin Dells Visitor & Convention Bureau Wisconsin Dells is home to more waterparks of every size per capita than anywhere else on the planet including: America’s FIRST rotating waterslide, Medusa’s Slidewheel, Mt. Olympus Resorts & Parks America’s LARGEST outdoor waterpark, Noah's Ark Waterpark America’s LARGEST waterpark resort, Wilderness Hotel & Golf Resort America’s NEWEST inflatable waterpark, Land of Natura! A thrill seekers parad