"Mondo Cane" aka "A Dog's World" (1962)
For such an unusual film, it has a major distinction: It's theme song, "More" was nominated for Best Song at the Academy Awards! It did win a number of awards.
Mondo cane (A Dog's World, 1962) is a documentary ... The film consists of a series of travelogue vignettes that provide glimpses into cultural practices around the world with the intention to shock or surprise Western film audiences. These scenes are presented with little continuity, as they are intended as a kaleidoscopic display of shocking content rather than presenting a structured argument. Despite its claims of genuine documentation, certain scenes in the film are either staged or creatively manipulated to enhance this effect.
Mondo cane was an international box-office success and inspired the production of numerous, similar exploitation documentaries, many of which also include the word "Mondo" in their title.