Often when you think of hauntings it conjures images of decrepit old buildings, battlefields and many other sites that can have numerous deaths attributed to the grounds. In general people feel that ghosts are only caused by violent deaths and haunt the place where they died.
In many instances where there are violent deaths there can be hauntings, but it is not the only circumstance. The reason why most people associate ghosts with these locations is because of the grim history that they do possess. It is far more common for people to know of a violent history of a location than a ‘quiet’ history.