At night the sky was red in McKeesport from the tube mill and the Bessemer converters. The scream of the converters was something to hear.
Riding on the B&O train into the city, you often passed open pig carriers on spur lines that were so hot I swear they could blister the paint on the train cars.
They had the B&LE (Bessemer and Lake Erie) and several other tiny lines running into and out of McKeesport, Dravosburg and Duquesne as well as Clairton and Elizabeth.
All along the river road from Glassport up, there are side roads with many places to hike, and Glassport was once the site of both the Copperweld, and Southwest Steel where most of the old steam locomotives were cut up for scrap. The river road on the opposite side of the river from Clairton was lined with steam locomotives for being sheared into scrap and then compressed into bales of metal for reclamation.
Over on Mifflin road is the Westinghouse Atomic Plant where submarine engines are /were built for the US Navy.
Have fun.
PE