Lost Island is the largest waterpark in Iowa! Walking through the gates at Lost Island will make you feel like you just stepped off a plane in some far away destination. We offer a wide range of attractions for all thrill levels. Enjoy the Wailua Kupua - one of the first hydromagnetic watercoasters in the country! Splash around in Tsunami Bay, race your friends down Ta'Katipo, enjoy a sweet treat from Fiji Fruits and Snacks, or an adult beverage from Sulu sweets and libations. Before you leave, be sure to enjoy our Adventure Golf and Go-karts. Lost Island is the perfect place for birthdays, Family reunions, and company outings. We look forward to giving you a one of a kind waterpark experience!