I mean, if we're talking globally, it's got to be the ones that have been fully absorbed by pop culture, right? The Japanese yūrei and yōkai stories have completely exploded internationally. Films like 'Ringu' and 'Ju-on' took the vengeful, wet-haired ghost archetype and made it universal. But the original folklore is so much richer. Yōkai like the kappa or the rokurokubi aren't just scary; they're these bizarre, rule-bound entities that reflect very specific anxieties about nature and social conduct.
And you can't ignore the Slavic tales. The Baba Yaga isn't just a witch in a chicken-legged hut; she's this terrifying, ambiguous figure who might help you or eat you depending on your manners. That duality is what sticks. It’s less about a jump scare and more about the pervasive, unsettling rules of a world where the forest itself is alive and hostile. Those stories feel like they’re about surviving in a place that doesn't want you, which honestly, hits different now.