In The Texas Chain Saw Massacre (1974), actor Gunnar Hansen (Leatherface) only had one costume. He couldn’t wash it because the film’s budget was so low, so it reeked terribly.
There’s a superstition that whistling at night attracts evil spirits, common in many cultures worldwide.
When so many cultures all around the world share the same fear, doesn’t it seem possible there might be something to it?
The Dyatlov Pass incident in 1959 remains unsolved: nine hikers died under mysterious circumstances, with some found with crushed skulls, missing eyes, and even a missing tongue.
If you’d like a horror film loosely based on this, I’d suggest “Devils Pass”.
The Wendigo, from Algonquian folklore, is a malevolent spirit associated with cannibalism and insatiable hunger.
This cryptid deserves its own movie.
The best I’ve found was the episode: Skin and Bones, from the series: Fear Itself
It stars none other than legendary Doug Jones.
Dario Argento’s Suspiria was originally written with children as the protagonists. The script was never changed, which explains the characters’ childlike dialogue.
The Hopkinsville Goblins were small, metallic-skinned creatures involved in a 1955 encounter in Kentucky, inspiring many “alien” tropes in pop culture.