At the end of Penn Station's passenger train shed along Liberty Avenue in Pittsburgh is the last remaining PRR Keystone. The train shed at Penn Station was built in the 1950s to replace original arched train shed built in 1902.
Indeed. I just wonder what will happen to it in the future. Whether it happens in 10 years or 50 years, the need for effective rail transit in the metro will require that KC's passenger station have more capacity than its current two-track island platform can handle. What will happen then? Will KC build some new station in a different location, or will the city go about restoring Union Station to its original configuration? In order to make Union Station into a functional train station again, the city would have to tear down the Science City building that's attached to the west side of the concourse and covers the former platform tracks, tear down the two Trizec office towers built on the former platform tracks to the east of the concourse just to make space for the tracks. Then, the platforms would have to be rebuilt, the platform access stairs/escalators/elevators rebuilt, and train sheds erected. I'd love to see the day that happens.