Suspiria
Suspiria was originally released in 1977. Last year, it saw a complete body horror transformation starring Tilda Swinton. The story is about a young ballet dancer from Ohio who wants more than anything to be accepted into an elite dance school in Berlin. She gets in but then discovers that it's a front for a coven of witches that manipulate the dancers for their own amusement.
The Devil's Backbone
Before The Shape of Water, Guillermo del Toro released The Devil's Backbone. This film is set during the Spanish Civil War. It's a psychodrama that does not leave anything to the imagination besides the origin of the specter that resembles the orphaned protagonist of the film. Also, del Toro claims that he loosely based the plot of this movie off of the specter that he was visited by as a child. Creepy.