If you're a fan of rail transportation, take a whistle-stop tour of Winnipeg Railway Museum. The exhibits here tell the story of the role trains have played throughout history.
You'll have sightseeing choices galore when in Downtown Winnipeg. Winnipeg Railway Museum is a good place to begin here, but there are many other worthy sights to appreciate. University of Manitoba, University of Winnipeg, and Polo Park are close to the rail transportation exhibition and will round out your day nicely.