ladyviper:I am sure there are others, but 2 that come instantly to mind are St. Augustine, FL and Alton, IL. Both of these places offer a plethora of ghost tours, supposedly they are 2 of hte most haunted cities in the US. So when you finish hunting Nessie and Bigfoot, take a stroll down to one of these places and maybe search for their ghosts...lol
I absolutely LOVE St. Augustine! 
I never have time to do one of the ghost
tours, though... too many other things always keeping me busy when I'm there!
Speaking of ghost tours, another favorite place of mine is Gettysburg.