It's hard to say which is the scariest. However, 'The Monkey's Paw' has a very disturbing concept. The idea that wishes can go so horribly wrong and bring about death and misfortune in such unexpected ways is quite scary. The story builds a sense of dread that lingers long after reading. It makes you think twice about what you might wish for if you were in that situation. And the fact that the paw seems to have a mind of its own is really spooky.
The unknown factor. In ghost stories, we don't really know what the ghost is capable of. For example, in 'The Woman in Black', the mystery around the woman's identity and her motives for haunting adds to the scariness.
For 'The Fall of the House of Usher', it's the decay and the sense of inescapable doom. The house is like a living entity that is slowly dying and taking its inhabitants with it. The incestuous undertones between the Usher siblings also add to the overall sense of unease and horror.
There's also 'The Monkey's Paw'. A family gets a magical paw that can grant wishes, but every wish comes with a horrible price. For example, when they wish for money, they get it in the form of compensation for their son's death, which is a very dark and scary twist on the concept of wishes.
The psychological aspect plays a huge role too. Take 'The Shining' for example. The main character's slow descent into madness and the way the hotel seems to feed on his weaknesses makes it terrifying. It's not just about ghosts but about the breakdown of the human mind under pressure.
The element of the unknown. In many of these stories, like in 'The Call of Cthulhu', there are these otherworldly and indescribable entities. We can't fully understand them, and that scares us because it goes beyond our normal perception of the world.
Well, often it's the unknown. In a lot of ghost stories, like the one about the Flying Dutchman. It's a ghost ship that sails the seas forever. No one really knows why it's there or what its purpose is. That sense of mystery is what makes it so scary.
One of the scariest elements is the sense of helplessness. When students got locked in a room in the old castle during a school trip, they couldn't do anything to get out immediately. Another is the fear of the dark. In the museum when the power went out, the darkness made the situation much scarier. And the fear of wild animals, like the bear at the campsite during the camping school trip.
I think the story about the shape - shifting monster might be the scariest. It can take on different forms, so you never really know what it looks like or where it is. It could be lurking around you as a harmless - looking animal one moment and then turn into a terrifying beast the next. It plays with your mind and your sense of safety. Plus, in the story, it always seems to target the most vulnerable people, like children or the elderly.
The story of 'The Babysitter and the Man Upstairs' is quite terrifying. A babysitter is taking care of a child at night. She keeps getting strange phone calls from someone asking if she's checked on the children. Then she realizes there's someone upstairs in the house. She tries to call the police, but the phone lines are cut. It creates a lot of suspense as she has to protect the child while being in a really scary situation.