There’s always been something special about Central City, Colorado. In the 1870s, the gold mining boom town was known around the world as the “Richest Square Mile on Earth.” The district produced 6.3 million troy ounces of gold – 200 tons – that would translate in 2025 to around $18 trillion. Central City was for a decade the largest town in Colorado with a population of up to 20,000 people, a gorgeous opera house, and the best hotel between the Mississippi River and San Francisco.