Location: Anchorage, Ala.
Maybe the one place on this list that makes sense to have an indoor water park is Alaska. As for the particulars of this place, there is not much to say. It exists. It has a stupid name. It has no reviews on Yelp. But, if you're ever in Alaska (unlikely) and want to go to a water park indoors while there (inconceivable), look no further than H20asis. See how much fun they're having in the photo? So much fun.