The Richest Hill on Earth: How Butte Copper Electrified the World
Few places on earth have earned a nickname as confidently as Butte. The mining district that residents called "the Richest Hill on Earth" was concentrated in only a few square miles of granite above the city, yet within that small area lay one of the greatest concentrations of valuable metal ever found. The hill produced copper above all, but it also yielded large quantities of silver, zinc, lead, manganese, and gold.