Indoor water parks seem to be the hit of the new millennium. We stayed at two this summer, one in Sandusky, OH, and the other in our own backyard. For $155 for the night at Zehnder's Splash Village, we got four admission tickets from check-in, good until 4pm the next day, to the water park.
Zehnder's had two high tube slides that you have to climb several stories to get to. I was nearly always winded. Once you reach the bottom, you are directed into a lazy river with a series of dump buckets, water squirters, and a waterfall to keep you soaked. There is a kidding pool with a variety of swings, slides, and erupting fountains of water.
The highlight here, like all indoor water parks, is the 200-gallon bucket of water that tips and douses those below it, spilling through a safety fence into the kidding pool. There is also another water slide and a series of water-spraying gadgets to play with along the way.