Probably in every city in the world, there are legends about ghosts. Especially such stories are popular in tourist places. There are always a lot of daredevils who will say that they are not afraid of ghosts and do not believe in these stories. But nevertheless, they will not check it at night :)
There is no scientific confirmation of this phenomenon. Therefore, with certainty, it can be said that ghosts are guaranteed to exist in one place - human fantasy. People come up with many things and start to believe in them. So there are legends and myths. I'm sure that if in a moment people forgot about ghosts - then ghosts would cease to exist. But it is not exactly:)
Good day:)