Ultimate Waterpark is a consumer guide to waterparks and indoor waterpark resorts, helping visitors research attractions and plan their trips. The site features a searchable waterpark database, with listings browsable alphabetically, by state, or on a map, and tools for finding parks near a selected location. Its coverage includes waterslides and other aquatic attractions, alongside information about hotels and waterpark tickets.

Visitors can explore park profiles, view photos, read insider tips, and consult reader ratings to compare destinations. The site also publishes waterpark news and original content, including updates about park access and resort offers. Its Top 10 list highlights popular North American waterparks based on estimated annual attendance, while recently rated listings show feedback submitted by readers.

Ultimate Waterpark also provides resources related to roller coasters and theme parks, extending its travel and attraction coverage beyond waterparks. Overall, it serves as an information and planning resource for people choosing aquatic destinations, researching individual parks, and discovering attractions across the United States and North America.