KeyLime Cove Indoor Waterpark Resort
Gurnee, Ill. 60031
Cost: Overnight rates for a family of four starts at $179. Fall rates are $149.
Hours: Check the Web site
The 65,000-square-foot indoor water park is exclusive to overnight resort guests. Additional amenities include a kids' entertainment area with a daily schedule of activities, an arcade, a day spa for adults and The Enchanted Lagoon kids spa. Food is available at six restaurants, including D.W. Anderson's Eatery and Ice Cream Parlor, and The Crazy Toucan Margarita Grille.