No. Tombstone and Gettysburg are both supposedly haunted. One of the more well known ghost photos was actually taken outside at Tombstone (the man who's sort of coming out of the ground in the background supposedly wasn't there when the picture was taken).
I also know there's a lot of talk about the island of Poveglia, and the island of Alcatraz (not just inside the jail, but also around the ruins and such).
And in response to Freebase, I also hate that. I don't understand why anyone would go to a cemetery and expect to see a ghost. If you think ghosts are spirits, why would they want to stick around where they're buried? I've visited cemeteries at night many o' time, but just for the creepy atmosphere. I definitely didn't expect to have any ghostly encounters. On the contrary, I have heard about ordinary houses being haunted. I guess they're just not as interesting as old hospitals and sanitariums. "I saw a shadow walk into the kitchen as I was eating a piece of toast" isn't nearly as exciting as a "black figure in the corner of the morgue". I imagine many people in those situations just accept whatever it is and don't call in "ghost investigators" or the local news or what have you.
On a somewhat related note, on my recent trip to Florida, we visited this insanely creepy house by this golf club... place. They showed it to me a couple years ago and I swear I've never been so creeped out by a house before. They all figured it would have to be haunted, but for me it was just insanely eerie. I couldn't even look at it. Everything around it is built up, but it just got took over by vines and grass and so on. It's also set back from the road and it's surrounded by trees, so doesn't that help anything. I had my friend Tony take pictures with my camera, since there was no way I was leaving the car. He got back just in time too, since a cop drove by really slow JUST as we were leaving.