It's only happened once in history that we know of, but a tsunami did once travel up the Mississippi River in Missouri and by the time it was done, 30 boats were no more.
If you've spent enough time near the Mississippi River, you know there are some strange things in those waters. That's proved true again as a man in Iowa just found something next to the river and no one has a clue what it is.
The future of one major river we have here in Eastern Iowa is in danger according to a recent list looking at the most endangered rivers in the United States.