Kalahari Resort
Sandusky, Ohio
877-525-2427

This massive, African-themed resort claims the honor of being the world's largest indoor water park. Catch a wave on the FlowRider, an exhilarating surfing simulator, or ride the Zip Coaster, a watery version of an indoor roller coaster. Families can splurge and rent an indoor or outdoor bungalow with flat-screen TV, fridge, security safe and comfy furniture. Kalahari offers activities for landlubbers as well. Kids can try their hand at mini-golf, pottery making and scavenger hunts. Stressed-out moms and dads can seek relief by way of a traditional Swedish massage in the spa.