For all-out ghostly potential, you have to go a ways to beat the Willey House site and story... most people are very familiar, but here's a quick summary:
Pioneering Willey family ekes out living halfway up Crawford Notch, farming and taking in travelers. Father Samuel Willey keeps a watchful eye on the crags above, and actually builds a shelter away from the house thinking it would be good to have a place to retreat to in case of a slide. The summer of 1826 is the driest anyone can remember -- dust everywhere, no rain for months. Finally, at the end of August, an honest-to-goodness cloudburst comes and drenches the soil. The family and a hired man or two are huddled in the house, but run out to seek shelter when they hear the rumble of a giant slide coming down the mountain above. At the last minute, the slide hits a boulder or tree and splits, sweeping away the family but sparing the house. Some versions have it that, when the rescuers came up the ruined notch days later, the family bible was still open to the 23rd Psalm on the table. Most of the bodies were found, crushed in the slide or in the Saco River, some said that the missing children were still out in the woods, feral.
Famous story, and one that really must have had a big impact on the psyche of the masses... it was the basis for Nathaniel Hawthorne's story
"The Ambitious Guest" among many other things. I have been fascinated with the story since reading an account of it when I was a kid, and I have to say, if you stop off at the site in the off-season, when it's quiet and there is no one around, it's certainly desolate edging toward eerie... though no, never seen a ghost or vapor there.
