These are not man-made formations. The beauty you find here took hundreds of thousands of years for nature to form. Some caves are winding canyons, some are flat broad halls, others are open like a cathedral. Some have waterfalls, rivers or placid ponds. At each turn a new view is seen and with each step a different perspective appears.
All caves have different minerals, life forms, sights and sounds.
At some you can even pan for gems. Now mines are a different story. Yes, nature did create the coal found beneath the surface of the Keystone State, but it took man to create the mines. No, I'm not a coalminer's daughter, but I am a coalminer's great-granddaughter, and I know that there is a lot of history behind coal mining in Pennsylvania. At the beginning of the Industrial Revolution every locomotive ran on coal, factory engines ran on coal, iron and steel needed coal to be manufactured, and most houses were heated with coal.