OK, in my mind, if you're gonna see Pittsburgh, you've got to see the iron & steel industry that put the city on the map. Where else can you tour an old iron-making furnace with guides who actually worked there? Now, it's not easy to plan a visit, given the old factory's only open on weekends and not during the winter, but if you can plan your visit to take advantage of the tours, they are more than worth the effort. You'll get up close and personal with the old furnaces, which (other than the rust and weeds) are just like they were left when they were shut down 30 years ago. Hint: a quick pre-read on the Internet on how iron and steel are made will help set you up for an immediate appreciation of the significance of what you're about to walk through.
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