If you're looking to cool off, July 28th is National Waterpark Day, and Valleyfair has some awesome things planned at Superior Shores to celebrate. The National Waterpark Day celebration on July 28th at Valleyfair runs from 11:00 a.m. to 6:00 p.m. and features activities like a "Seek. How the scavenger hunt will work:There are 20 numbered signs hidden in plain sight throughout Superior Shores Waterpark. Jordann Rylance, Valleyfair’s communications manager, said: “National Waterpark Day is the perfect opportunity to celebrate everything guests love about summer. Whether you're racing down a waterslide, relaxing beside the wave pool, or making memories with family and friends, Superior Shores offers the ultimate summer experience.”