Ghosts, spirits, or entities, whatever you choose to call them,  they are every where.  Spirits are not stationary beings. Once our body passes our spirits/souls are free to roam.  

      Every being, every location and every single place has a story to tell.  Energy does not leave.  It is ever present.  Negative energy seeps into the wallpaper and stays forever especially when there is some kind of drama involved, a murder, a suicide.. well you get the point.  Often the departed just want to stick around.