It's the Philadelphia Auto Show! But, look a little closer and you'll note this is no ordinary building. Where once Reading Camelbacks, RDC's and F units sat staged on 12 terminal tracks, now sit their automotive counterparts. An ironic twist of fate though the rail route was preserved. Today this hall, the former Reading Terminal train shed, sits preserved and incorporated into the Pennsylvania Convention Center. It remains the largest covered train shed in the United States. The trains now travel below ground in a tunnel which connects this former elevated stub end station to the PRR built 30th Street Station via Suburban Station which itself was a PRR stub end station.