Slide into fun at the Edgewater Hotel & Waterpark! We are located near the shore of Lake Superior. The only 35,000-square-foot indoor waterpark in Duluth. The waterpark features two four-story waterslides, lazy river, whirlpool, vortex pool, critter walk, and basketball pool. The park also features a Paradise Playground with three kid-sized waterslides, water-spray fun, a huge dumping bucket, and other fun features.