Author John Coy thinks it's pretty cool that there's only one waterfall on the Mississippi, and that it actually moved 15 miles upstream several thousand years ago.
So he set to work distilling 12,000 years into 619 words, with the help of an artist who seemed fated to take part in the project ... and the waterfall itself.
My Mighty Journey: A Waterfall's Story is published by the Minnesota Historical Society Press.