With me it can be either a person - like the guy I saw in the middle of a market town, on a swelteringly hot day a couple of years ago, dressed in a furry black and white penguin suit. WHY??? Not one person batted an eye lid as he sat down on a bench, pulled a bottle of water from a pocket under one wing, took his head off and drank, replaced bottle, replaced head, got up and carried on. Where was he going? There is also an old chap in the village here I have used as a character in a story, and several other people I have come across or know of.
Or it can be a place, often a place which has a certain feeling about it will evoke a slightly ghostly story. A view seen from the car on a day out. There is one particular airfield near here from where Lancasters used to fly and whenever we drive past the end of the runway I look over and am taken back to the 40s, I can almost see land army girls in their dungarees, headscarves holding back their hair, taking a moments pause to lean on their rakes, look up and follow the aircraft as it flies past them in the fields. I can even hear the engine....that gave me the basis for a story, which has never got anywhere, but I keep having a look at it, a bit of a rewrite here and there, a tweak here and there, and submit sometimes to a competition or mag, though the markets are getting fewer.