Specific water parks designate one slide as the official "Waterslide-athon" slide. During the event, for every guest who goes down the slide, a donation is given by the water park to the Ronald McDonald House Charities® of Madison, WI. As the #1 destination in the country, TripAdvisor.com 2010, we believe it’s vital to come together as a community and do something to help families in need. So again this summer, we are staging the 7th Annual Wisconsin Dells Waterslide-athon – a perfect fit for “The Waterpark Capital of the World!®”