Busch Gardens is the name of two amusement parks in the United States, owned and operated by SeaWorld Parks & Entertainment, a division of Blackstone Group. One of the parks is in Williamsburg, Virginia, and the other is in Tampa, Florida. There was also previously Busch Gardens parks in Pasadena, California (1905-1937), Van Nuys, Los Angeles, California (1964-1979) and Houston, Texas (1971-1973). Busch Gardens parks were initially developed as marketing vehicles for Anheuser-Busch and featured hospitality houses with samples of Anheuser-Busch products. They also included stables that housed many of the company's Clydesdale horses, which have been associated with Anheuser-Busch since 1933. Eventually, rides and attractions were added to the parks and over time were developed into full theme parks while still promoting Anheuser-Busch.