¿Quién puede matar a un niño? (1976)

Narciso Ibáñez Serrador
Also Known As: Who Can Kill a Child?
A couple of tourists rent a boat to visit the fictitious island of Almanzora. When they arrive, they find the town deserted of adults, there's only children who don't speak but stare at them with eerie smiles. They soon discover that all the children of the island have been posessed by a mysterious force or madness which they can pass from one to another, and which makes them attack and murder their elders, who can't defend themselves because nobody dares to kill a child...

The Black Cat (1934)

Edgar G. Ulmer
Honeymooning in Hungary, Joan and Peter Allison share their train compartment with Dr. Vitus Verdegast, a courtly but tragic man who is returning to the remains of the town he defended before becoming a prisoner of war for fifteen years. When their hotel-bound bus crashes in a mountain storm and Joan is injured, the travellers seek refuge in the home, built fortress-like upon the site of a bloody battlefield, of famed architect Hjalmar Poelzig. There, cat-phobic Verdegast learns his wife's fate, grieves for his lost daughter, and must play a game of chess for Allison's life.

The Innocents (1961)

Jack Clayton

Miss Giddens , a nineteenth century British governess, is appointed to take care of two children, Flora and Miles . Upon arriving at the bleak mansion she meets the housekeeper and also Flora. Miles arrives a few days later from school. The children seem like little angels but, following a series of bizarre events and examples of the children's wicked impulses, Miss Giddens begins to suspect that all is not what it seems.