Released in 2015 as a Cast Exclusive Limited Edition of 500 units, this pin commemorates the 50th Anniversary New York World's Fair by showcasing Primeval World Diorama as one of the four attractions introduced at that time. Designed as a multi-colored stylized rendition of the Primeval World diorama, featuring audio-animatronic figures set in a misty swamp with prehistoric dangers, it is mounted on the left side of a unique backer card decorated with abstract pastel designs above a purple section detailing the historical context of the exhibit; below these elements lies a gold Mickey icon waffle pattern with stamped sections and an ODPT logo. This shared release at both Walt Disney World and Disneyland features four pins total, including this fourth installment in the series which continues to captivate visitors today by transporting guests back to a prehistoric land filled with awe and wonder as dinosaurs now thrill park crowds alike.