The 'Okiku' story from Japan is quite terrifying. Okiku was a maid who was wronged and killed. Her spirit is said to haunt the place where she died, counting plates with an unearthly voice. Another one is the 'Pontianak' from Malay folklore. Pontianak is a female vampire - like ghost that preys on men. It is often associated with banana trees and its appearance is really spooky.
The Thai ghost story of Krasue is quite terrifying. A Krasue is a female spirit that separates her head and entrails from her body at night and flies around in search of food. The idea of a floating head with its guts trailing behind is really spooky.
A really scary anonymous ghost story involves a bridge. It was said that a young girl had jumped off the bridge to her death many years ago. Since then, drivers at night would sometimes see a girl in a white dress standing on the edge of the bridge. When they stopped to help, she would disappear.
A really scary one is about a hotel room. Guests would wake up in the middle of the night feeling a cold presence. They would see the imprint of a body on the bed next to them, as if someone was lying there. It was said to be an entity that met a tragic end in that room.
A student in a dorm once woke up in the middle of the night to see a white figure floating above his roommate's bed. He was so scared that he couldn't move or make a sound. When he finally managed to turn on the light, the figure was gone and his roommate was still sound asleep.
The scariest I know is of a teacher who hanged herself in the school attic. Ever since, people would hear strange sobbing sounds coming from there. If you go near the attic during the night, you can sometimes see a faint silhouette of a woman swinging slightly, as if still in the act of her final moments.
In a particular mine, there were reports of a ghostly miner who would push people. Workers would suddenly feel a shove when they were alone in the tunnels. It was thought to be the angry spirit of a miner who had been mistreated during his life. The atmosphere in that mine was always filled with fear, and many miners refused to work there in the end.
The scariest I know is of a pup in an old, abandoned house. A group of kids exploring the house heard the sound of a pup crying. When they followed the sound, they saw a shadowy figure of a pup. But when they got closer, it disappeared. They later learned that a pup had died in that house decades ago and its spirit still haunts the place. It's terrifying because it makes you wonder what else might be in that abandoned house.
One of the scariest is the story of the hound of the moors. It's a large, black dog with glowing red eyes. It is said to roam the moors at night, and if you hear its howl, it's a sign of impending doom. People have reported seeing it chasing after lone travelers, and those who have been chased say they feel an intense cold and fear.
The story of the Black - Winged Demon Ghost. It's said to have huge black wings and a face so terrifying that just one look can paralyze you with fear. It haunts an old castle and preys on those who enter uninvited.
The scariest mummy ghost story I know is about a mummy that was found in a hidden tomb. When a young explorer found it, he took a small relic from the mummy. That night, the mummy's ghost visited him in his dreams, demanding the relic back. Every night, the dreams got more and more terrifying until the explorer finally returned the relic.