Through its history, Hanna-Barbera has operated theme park attractions, mostly as a section in Kings Island, Carowinds, California's Great America, Kings Dominion, Canada's Wonderland, and recently, Six Flags Great America.
Outside North America, the theme parks were also available in several countries, notably in the United Kingdom, China, India, Gabon, and even Australia, which was part of Australia's Wonderland, which was now defunct. Hanna-Barbera Land was also opened in Houston, Texas.
The sections contained in the KECO Entertainment-owned parks was retained when their parent park, except the one in Australia, was bought by Paramount Communications (formerly Gulf+Western, and later acquired by Viacom), then the parent of Paramount Pictures, which changed the name of the parks by adding "Paramount's" in front of their names. The park in Australia was not purchased by Paramount and was sold to a local company. KECO Entertainment was renamed into Paramount Parks in 1994, around the time of the Viacom purchase, and remained in existence until 2006. As part of the 2005 Viacom split, ownership of Paramount Parks was transferred to the CBS Corporation. CBS then sold the parks to the Sandusky, Ohio-based amusement park management company Cedar Fair Entertainment Company on June 30, 2006.