Big Boy...designed specifically to haul payload over the mountains. It needed to carry an ungodly amount of coal.
A Pullman (sleeping) car in rather good condition. There was a neat exhibit inside that made use of big LCD screens and an animated attendant would speak about civil rights as they pertained to train travel.
In addition to the enclosed warehouse, there was a "trainport" of sorts with more specimens. They were covered, but still exposed to the outside elements. Walking through some of them, it was so cold and quiet, it felt like I was walking through something frozen in time.