Surrounded by large stands of virgin white and red pines, an enterprising iron prospector named Frank Hibbing set up camp on a bitterly cold day in January of 1892. When he awoke the next day, he insisted that there was iron beneath him-he could "feel it in his bones." He staked his claim near that campsite, and after digging several test pits, one of the world's richest deposits of iron ore was found. Beginning as a small collection of tents and...