Park City Museum Visitors step out of the cage and into the Ontario Mine as part of a tour in the Silver Mine Adventure, circa 1995-1999. Park City Historical Society & Museum, Myles Rademan Collection If you explore the Park City area, I guarantee that you will bear witness to at least one of the historic mining structures scattered all around. Before Park City transformed into the posh resort destination as we know it today, it was a mining powerhouse. A hotbed for silver and many other valuable ores, the mines around Park City quickly became some of the top exporters in the nation.