4. National Mining Hall of Fame and Museum (Leadville, Colorado)
What better place to celebrate last year’s 150th anniversary of the discovery of gold on California Gulch than here? Leadville might be best known for silver, but its history is golden, and so is this treasure housed in a 72,000-square-foot Victorian school. Among the golden anniversary highlights: a traveling exhibit on the Colorado Gold Rush and the Miner’s Ball and Wine Tasting, and, of course, the annual National Mining Hall of Fame Induction Banquet.