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Schlitterbahn, New Braunfels, Texas. One of four parks in the Schlitterbahn collection, this 70-acre favorite rises to the top because of the innovative section it unveiled in late 2011, which includes “the World’s Longest Waterpark Ride” and offers 3,600 feet of waves, rapids and waterfalls for tubers.
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Disney's Typhoon Lagoon, Orlando, Florida. This is most-visited water park in the world with more than 2 million guests a year (according to 2010 statistics of the Themed Entertainment Association) is this Disney World water park (which joins one other at Disney World, Blizzard Beach, with just under 2 million visitors a year).