I went to the railroad museum in Scranton, Pa which was great and has many impressive machines.
Also, the railway museum in Sacramento is wonderful (thanks, c.i.) and is apparently better funded than the Pa one.
I can share some pictures here if anyone is interested.
On the subject of paintings, I think the 1930s series of pictures which were done as advertisements for British Railways, principally to promote tourism, are very evocative.
Whoo that's a bit small, sorry.