Noah's Ark Water Park in Lake Delton grew from a small roadside attraction opened in 1979 on the former Delton Outdoor Theatre site into a defining destination of the Wisconsin Dells. Marketed as the largest outdoor water park in the United States, it developed through successive owners and major additions, including pioneering attractions such as Endless River, a notable early lazy river, and The Wave, which established its large-scale reputation. Later headline rides like Black Anaconda, Time Warp, and Scorpion's Tail strengthened its national profile. Despite setbacks including a 2012 fire and a 2020 shutdown, it remains a signature resort-area attraction.