I recently went on a very long hike looking for the ghost town of Melmont, Washington. It was a great example of building things up too much in the imagination.
The town wasn't nearly as ghostly or as dramatic as I'd envisioned it would be. The trail was great, though.
I wrote about it over at my travel blog, Northwest Nomad: http://nwestnomad.com/uncategorized/where-the-heck-is-melmont-ghost-town-anyway/