All photos and captions from a Great Northern folder published, I believe, in 1958, although the domes were added to the train earlier in the 1950s.  Amtrak’s Empire Builder travels the same route from Seattle/Portland to the Twin Cities (although via Grand Forks and Fargo, as the Western Star did), but uses the tracks of the former Milwaukee Road (route of the Hiawathas) from the Twin Cities to Chicago, whereas the pre-Amtrak Empire Builder used the Burlington for this leg. Since Milwaukee Road and Burlington both used Chicago Union Station, the beginning and end points of the present day train are as they were since its inception, and the schedule is almost the same as it has been since the train was streamlined in the late ‘forties.