Kalahari Resorts Sandusky (173,000 sq ft)

Kalahari Resorts Sandusky (173,000 sq ft)The Kalahari Resorts in Sandusky is the largest indoor water park in the US. The water park contains a unique roof system which lets in the most natural light, allowing people to receive a suntan at any time of the year. The resort also features a wave pool, two surfing simulators and a basketball pool. The thrill rides have names such as Tanzanian Twister, Rippling Rhino and Swahili Swirl.