This one is really good. I rarely like foreign films where I have to read subtitles, but this one is so interesting that I found myself really enjoying it. Tense with good atmosphere and story. This is highly recommended to any horror fan.
The Devil's Backbone [Criterion Collection] [Blu-ray] [Spanish] 
Directed by Guillermo del Toro. With Marisa Paredes, Eduardo Noriega, Federico Luppi, Fernando Tielve. After Carlos - a 12-year-old whose father has died in the Spanish Civil War - arrives at an ominous boys' orphanage, he discovers the school is haunted and has many dark secrets that he must uncover.
The Deserter (The Devil's Backbone) (1971) - FilmAffinity
Guillermo del Toro stuff (I ALREADY HAVE Pan's Labyrinth, The Orphanage, The Devil's Backbone, Blade II, Hellboy I & II, Cronos, Mimic, Books 1 and 2 of the Strain Trilogy, Cabinet of Curiosities book, Pacific Rim)