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Here is a site with good photos of the open pit mines in the Mesabi Range ;

Mesabi Range

And a video, but you can't really appreciate the scale unless you stand at the edge of that pit.
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Ferrum – Swedish Iron and Steel through the Ages - Tekniska museet [NS4 version]

Take a wander through the history of iron in Sweden - from prehistoric iron production to today's high-tech steel...

Just to be clear, Tim has done that with a few special project razors, not his usual production stuff AFAIK. Matter of fact he has made at least two razors partially, if not completely, out of steel...

I believe that is Tim Zowada, working in Michigan IIRC.

There was once a thriving iron industry in the Mesabi range in Minnesota. Hematite, and then when that played out the industry died until they found a way to process the tailings from the hematite,...