1635: "Nahanni: The River That Refused to Be Touched"

Interesting Things with JC #1635: "Nahanni: The River That Refused to Be Touched" – A river runs for hundreds of miles with no dams and no control, then suddenly drops nearly twice the height of Niagara while the land around it was never flattened by glaciers, leaving terrain that still acts differently and forces anyone who goes in to stay there for weeks