This is more for Tom (Number 90) but Bob might like this location as well.
A few blocks north of both Stations is Holiday Inn on Wolf Point. For a rail fan this is, in my opinion, one of the better options.
1, Along the original C&NW (Galena and Chicago Union) tracks, the first tracks in Chicago.
2, Walking distance to the Northwestern station, (I know, it’s now called the Olgive Transportation center) and a bit longer walk or cab to Union Station.
3, Depending on the room view a very nice view of the river and train movements into and out of both stations.
4, Walking distance to many nice restaurants.
5, If you do get a room with a bad view, you can go up to the restaurant and get a really nice view looking down the river.
6, Distance from Union Station via Mapquest is less than a mile.
http://www.ihg.com/holidayinn/...=0&icdv=99504440
The one drawback to this location is that Michigan Av. is a bit more “Hopping” for visitors.
Charlie