I love Shorpy. One great photo is "Upward Mobility: 1908". This photo shows Cincinnati, Ohio, c.1908 - "Mount Adams Incline". This is one of those photos that you can spend hours looking at. On the left side is a barely visible culvert peeking out of the rubble. This gave me an idea to use on my layout.
I had some "leftovers" from building my coke ovens so I could modify an oven casting to a culvert.