Portland Walking Tours has an amazing tour perfect for the Halloween season.  Toting real ghost hunting equipment with real members of the International Ghost Hunters society you can crawl through passageways and explore known sites of paranormal activity.  Come for the tour after 10pm (18+, no kids allowed) and they will show you the sites of actual murders and suicides, all said to now be haunted by those who died.    This is not a performance, this is an actual look into the paranormal side of Portland.  Nothing is staged, and no ghost sightings are guaranteed.  Make sure to get your tickets in advance in order to actually operate the ghost hunting equipment.  Check out Portland Walking Tours for more information and ticket purchases.