El castillo de los monstruos ('The Castle of the Monsters') is a 1958 Mexican horror comedy directed by Julián Soler.

Mexican funnyman, El Clavillazo, is in love with a seamstress named Beatriz and also hangs out with a variety of odd characters, including a newsboy and a mental patient.

The doctor poses as a kindly blind man in town and uses hypnosis to lure Beatriz to his castle, brainwashing her into believing that she is his own love and that she is named Galatea.

The other monsters include a werewolf, a mummy, a vampire (clearly modeled after Count Dracula), and a gill-man (clearly patterned after Creature from the Black Lagoon).

Clavillazo and Beatriz are trapped in a room and about to be crushed by the walls moving together when they are rescued in the nick of time by the rest of the gang, and they all live happily ever after.