I am still looking at the "Shorpy" website, and as I post this, there are two old Railroad related photos at the top. If this changes by the time you check them out, just scroll down to the photos. The link is: https://www.shorpy.com/
The first photo is of the Atlantic Avenue elevated station in Brooklyn in early August 1910, with an open sided elevated car in the station. Were these only used in summer, or could they be converted like the genrally similar streetcars?
The second photo is of the Louisville New Orleans and Texas Rogers 4-4-0 number 8 working an extra passenger train in the canefields in 1897.
These are photos in the Library of Congress collection that have been recently scanned to a high standard which makes them an amazingly detailed window into the past.
Peter