How do I describe the horrors?!!! First, some points: First, this review should be taken with a grain of salt -- I saw this over 20 years ago, when I was a boy, at the Museum of Modern Art in New York City.
Secondly, I am giving away some scenes and plot points. However, it does not have much of a plot.
Finally, I don't enjoy these type of art films anyway.
This film was directed by proto-auteur Luis Bunuel. He was a surrealist and dadaist. These were modernist themes or movements popular critically in the 1920's and early 1930's. Surealism was the school of art that made things hyper-real, yet often had Freudian symbolism. Dadaism is based on what is supposedly the first word made by an infant -- Dada, or father.
Made in black and white, it was also made by a band of communists (or as they preferred the term, socialists). Bunuel and his group of fellow film-makers and artistes had been working on a number of symbolic ideas and issues in Spain and France between the world wars.
Dadaism and surrealism influenced a lot of artists -- The Police (Doo doo doo da), poet Arthur Rambaud, Edvard Munch (The Scream), Rene Magritte (floating hats in space), Salvador Dali (melting clocks), and even Hitchcock (Psycho). No Norman Rockwell.
Here's what I recall most about this film: a girl meets up with a cow; her eye gets slashed by a razor; clownish men cavort in a meadow. There is not, as I said, much of a plot, but then again, that must be the point.
This was attacked as porn back then, and would be again today. One of the trade-marks of surrealism is a significant anti-feminism.