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It's neat that you are a history buff. I bet you have some good historical reenactment events around you, for various times of history.

Mostly agricultural history around here. But the Mississippi and Missouri Rivers on each border hold a lot of early exploration history. There is also the Mormon Trail in southern Iowa that cut from Nauvoo, Illinois to Salt Lake City, UT.

Just the changes from prairie to agriculture would be so interesting. And connected with your big rivers, especially wetlands and the channels, and how people used those rivers. So much history!