Submitted by marmarinou – who runs a cool Tumblr dedicated to Chicago-area railroads and trains.

A very basic map of the South Shore Line between Chicago, IL and South Bend, IN appended to the back cover of a railfan tour brochure from 1939. The day-long tour of the line was organised by the Central Electric Railfans Association, which is still extant today. Check out the original source of the image (keep scrolling down) for the inside spread of the brochure detailing the day’s events – it was quite the itinerary!

Source: thetrolleydodger.com