How about a story where a person starts having nightmares that come true, and they can't escape the impending doom? It would be really creepy. There could also be a mysterious fog that turns people insane when they get caught in it.
You could have a story about a cursed town where every full moon, a strange creature emerges and terrorizes the locals. Another idea is a mirror that shows a person's worst fears and starts to control their actions.
Use isolation as a key element. For example, a lone lighthouse keeper on a desolate island starts to notice strange lights in the ocean at night that seem to be getting closer each day. Another idea is to have a character lose their senses one by one. First, they lose their sight and then start to hear strange whispers. This can build a lot of tension. You can also write about a town where all the children start to disappear mysteriously, and the adults are too afraid to look for them.
Alien abductions can make for a scary story topic. The unknown nature of aliens and the idea of being taken against your will to a strange place is quite terrifying. Plus, the potential experiments and unknown fates add to the horror.
Often, it's the reality and the fact that it actually happened that makes a true story terrifying. Knowing that these horrors are not just fictional but part of the real world can be very disturbing.
A good idea is to have a story centered around a cursed object. For example, a doll that was made by a witch. Whoever owns the doll experiences horrible nightmares and sees a female figure in white hovering around them. The doll seems to move on its own and gives off an evil energy.
Well, in some of the stories, the sudden appearance of a ghostly figure can be really terrifying. For example, a character might turn around and see a pale, translucent figure just standing there, with eyes that seem to pierce through their soul.
Another aspect could be the use of local legends and superstitions. Texas has its own unique folklore. If the story incorporates things like cursed land or haunted burial grounds, it would add to the horror. These elements can make the audience feel a sense of dread as they are often associated with things that are beyond our understanding.
It could be the fact that it was a real event. Knowing that people actually faced this plague, with all its consequences like the spread of disease, the breakdown of communities, and the helplessness in the face of it, makes it terrifying. It might also show the ineffectiveness of initial responses, which added to the horror.
One terrifying ghost story is 'The Bell Witch'. It's about a malevolent spirit that haunted the Bell family in Tennessee. There were strange noises, objects moving on their own, and the spirit would physically harm the family members. Another is 'The Brown Lady of Raynham Hall'. Supposedly, her ghost has been seen gliding down the stairs in the hall. The apparition is said to be that of Lady Dorothy Walpole, who was locked away in the hall after her affair was discovered.
A great terrifying fantasy novel is 'Pet Sematary' by Stephen King. It deals with themes of death and the supernatural in a very scary way. 'Annihilation' by Jeff VanderMeer is also quite terrifying. The strange and alien world it presents is full of mystery and danger. Then there's 'The Ritual' by Adam Nevill, which has a very menacing and foreboding feeling that stays with you long after you've finished reading.
The story of the Mothman is also terrifying. In Point Pleasant, West Virginia in the 1960s, people reported seeing a large, winged humanoid creature. Strange events followed, including a bridge collapse that killed many. The mystery surrounding the Mothman and its possible connection to the disasters makes it a truly spooky true story.