9. Kalahari Sands
Location: Sandusky, Ohio
They advertise Kalahari Sands as the largest waterpark in the U.S. under one roof. They have tons of shit you can do, and we could list those things, but let's be honest, you're too distracted. We know exactly what you are thinking. It's in Sandusky! We gotta suspect business is suffering just a little bit lately.