Casa Bonita opened in 1974 in an unassuming strip mall. The massive "Disneyland of Mexican restaurants" is an Old West and Acapulco-inspired fever dream made famous by its indoor waterfall, cliff divers, and haunted caves, and was featured in a classic 2003 episode of South Park. When its creators, Trey Parker and Matt Stone, learn that Casa Bonita might close its doors for good, they attempt to preserve a crumbling piece of their childhood and Denver history.