There are dark entities in those villages, and they do not wish to be found. Remember the forest of enchanted briars which kept The Prince away from Sleeping Beauty? The shrubbery you are seeing around signposts consists of scions of that very forest.
Have you ever asked yourself why the shrubbery burgeons at the signposts and nowhere else? Well, have you?
Whatever you do, don't enter a castle which has no inhabitants, where food mysteriously appears on the banquet table, where there's a cupboard and a voice from nowhere that says "Don't open the cupboard."