The 1972 film "Cannibal Holocaust" directed by Ruggero Deodato is considered one of the most controversial movies ever made.
The film is a pseudo-documentary about a group of filmmakers who disappear while making a documentary about a cannibal tribe in the Amazon. The movie is known for its graphic violence, sexual content, and depiction of animal cruelty.
Due to the intense and realistic nature of the violence and the fact that some of the animal killings were real, it has been banned in several countries including Italy, Spain, Australia, and the United Kingdom.
Many consider it one of the most disturbing movies ever made and it remains banned in several countries till date. It's important to note that the movie is not suitable for all audiences and viewer discretion is advised.