Footsteps in the attic. Alone in the house, hearing those footsteps in the attic is really terrifying. You don't know what's up there, and every step seems to be getting closer, sending shivers down your spine.
How about 'Knock, no one there.' You hear a knock at the door, but when you open it, there's nobody. It leaves you with a sense of unease and the feeling that something is playing tricks on you.
Empty House. There's something spooky about an empty house. It stands there, quiet and desolate, and you can't help but wonder what happened inside or if there are unseen presences.