Pirates of the Caribbean is a Walt Disney Company franchise encompassing a series of films, numerous theme park attractions, and spin-off novels as well as numerous video games and other media publications. The franchise originated with the Pirates of the Caribbean theme ride attraction, which opened at Disneyland in 1967, the last Disney theme park attraction overseen by Walt Disney. Disney based the ride on pirate legends and folklore. As of August 2006, Pirates of the Caribbean attractions can be found at four Disney theme parks. Their related films have grossed almost US$ $3.72 billion worldwide as of 2011.