Here is Buffalo's Central Terminal, a gorgeous old monolith of a building that stands, unused and (somewhat) neglected, on Buffalo's East Side. The trains don't run there anymore, and the building fell into much disrepair over the decades it stood there; but in recent years, it's been the focus of a volunteer restoration effort that has done a lot of great work there.
When there was a brief push for high speed rail as part of the stimulus package a few years ago, folks wondered if maybe the Central Terminal could serve as Buffalo's HSR terminal, but apparently this is not possible. Oh well.
Long live the Central Terminal!