250,000 (combined size of the Wilderness' three main indoor water parks)
Massive facility includes Fantastic Voyage, a family raft ride that sends guests spinning through the dark, The Surge, an "interactive" wave pool, Sulfur Springs, an indoor-to-outdoor hot tub, body slides, tube slides, lazy river, two large play and spray structures, water basketball, and play areas for small children.
135,000 square feet of activities, including speed slides, tube slides, body slides, lazy river, huge swimming pool, hot spas, and a children's play area
Wilderness Feature Story and Review
Wilderness Fantastic Voyage Ride Review
A Lotta Water: Many Water Parks Claim to Be the Biggest. (Is it the Wilderness?)
Search for Wilderness Indoor Water Park Resort Wisconsin Dells rates at About.com's booking partner, Kayak.


