Our good friend, the Duquesne Hunky, posted a marvelous panoramic photo of Duquesne, Pennsylvania taken in 1938 which includes a complete view of the neighborhood “below the tracks”.  This entire neighborhood was razed for the steel mill expansion in 1941, but you can view it on this photograph along with the rest of the city.  Zoom in and join the sleuthing to help identify old buildings that no longer exist by visiting here.  I have also added the link on my most popular page “Businesses Below the Tracks”.