A ghost is a soul or spirit of a dead person or animal that appears to the living. They can appear as invisible presence to translucent or barely visible wispy shapes, to realistic, lifelike forms. If you try to contact them it's called necromancy,spiritism or a seance. There are people who try to talk to ghost, they are called ghost hunters and they use a variety of equipment to contact them. Ghost perfer night time because it's said the less electronics around the easier it is to spot them.
Ghost have been spotted everywhere