Waterparks.com is the World Waterpark Association’s official site for tourists and park visitors, providing tools for locating member parks around the world via an interactive map, where all the waterparks are listed, but users only get extended information on parks that belong to the WWA.
Also take a look at the important information on first-time visits, like what you should take with you and what you should leave at home, plus extensive safety issues related to water, sun and miscellaneous stuff both for adults and kids. A particularly useful section to be found at Waterparks.com is a list of usual discounts and promotions that waterparks have, so that you can double check to see if there are any perks you can take advantage of. For waterpark administrators and businesses related to them, take a look at the corporate section to which this site links, and find out about membership details and benefits. 
