Oceans of Fun is a water park that opened in and is next to the amusement park. Admission to Oceans of Fun is included with the price of admission to Worlds of Fun. The park opened on May 26, The park was originally planned to complement a acre 2. In , the first addition to Worlds of Fun was the 4,seat Forum Amphitheater, which opened in the Europa section of the park. In , a new section opened in honor of the United States Bicentennial — the th anniversary of the signing of the Declaration of Independence —and was named Bicentennial Square.
The new section included the debut of Screamroller from Arrow Dynamics , which was a replica of the first modern looping roller coaster, Corkscrew , that opened a year earlier at Knott's Berry Farm.
In , Oceans of Fun opened next door as the largest water park in the world. In the same year, a sub-world named "River City" was opened in Americana, adjacent to the East Asia section then referred to as the Orient section. Screamroller was transformed into Extremeroller the following year, which featured stand-up trains instead of the original sit-down models, making it the first looping, stand-up roller coaster in North America.
Morgan Manufacturing steel hypercoaster , to the park's attraction lineup in Rides, attractions, shops, shows, and restaurants are named according to the area theme. Guests enter the park at International Plaza. In , the Americana "main entrance" was closed for the creation of Grand Prix, so the "back gate" has been the "main gate" ever since. The next world to the left is Scandinavia, then Africa, continuing in a clockwise rotation, guests would then enter the Wild West section, then the Americana section, followed by East Asia.
The Europa section is located in the approximate center of the circle. Behind the Wild West section lies the section of Planet Snoopy the area of the park specifically for young children. Originally added in as an expansion of Americana, over the years the grounds have changed its identity several times.
