Many grain mills met with unfortunate ends around here. One of the more explosive ones happened in the state capital of Minneapolis. Apparently, the fine wheat flour dust can actually explode. There's a great article about that disaster here, if you're curious.

There are some old iron mines in the northern part of the state that have tours. I'd love to see some of those. The coal mine sounds fascinating. I bet that was a dangerous place to work, too.

Surprisingly, Pickwick had a dust collecting room. I don't know how well it worked, but the people giving the tour said that, even when they have things up and running, they won't process grain because it's too dusty. Also, it takes a long time to clean everything up. It would make for amazing photos, though!