Which of these is your favorite? If you say other state which it is. Mine is Kalahari Sandusky. Not just for the waterpark, which is nothing but amazing, but the hotel is great too.

Only been to the two in the Dells, but my vote is for the Kalahari there.

I've been to many, and I have to say even though the rides are amazing at Kalahari Sandusky, it's impossible to get into the restaurants, because when they added new rooms with the sands, they added no new place to eat, and plus the service there is pathetic, so I have to say GWLMason is the best.

Where is Maui Sands??

You mean where was Maui Sands. It opened last May and was the fourth major waterpark in Sandusky. It closed virtually without warning in November.

^^Ohhh....and here I thought the market wasn't over-saturated?!

Go to the Dells, trust me its not over saturated in Sandusky, the Dells host close to a dozen indoor parks (4 major players, Great Wolf, Kalahari, Wilderness, and Mt. Olympus) in addition to their 3 outdoor stand alone parks.

Location, location, location. Sandusky in mid-winter is few people's idea of a glorious wintertime destination. Nor is Chicago a stone's throw away. Cleveland, Detroit and Toledo have not supported waterparks in winter to the same degree as Chicago and the Wisconsin areas have supported the Dells. Waterparks are very market dependent. What works in the Dells may or may not work in Sandusky, Mason and/or Charlotte.

I have two favorites. One is the Wilderness in the Dells and the others is Fallsview waterpark in Niagara falls

I like CoCo Key's water park as much as I do Great Wolf Lodge Mason. However, I voted for GWL because I LOVE the GWL hotel, restaurants, entertainment, and overall atmosphere. And as far as the Sheraton Hotel that CoCo Key is located in and its restaurant, I'm not that impressed as it is business-oriented, not family-oriented.

I've never been to any indoor waterpark , but i would like to go to one someday