I know if a house is haunted. I'm not kidding. It's called clariescence. I don't "see dead people" but I know if something is in a house.
My Man used to rely on my when we were looking for houses. We'd walk in and he'd ask me, "What's going on here?" and at the end of the showing, he's ask me away from the agent if I thought it was a quiet safe place.
There are houses I've walked into (both looking to buy and otherwise) and walked right out of. Usually we find out later the owners know the place is haunted. My Grandmother, Great Grandmother and other relatives share this gift.