- ... that Oil Creek State Park (pictured) in Pennsylvania is the site of the world's first commercial oil well?
- ... that Robert Coleman, owner of several iron furnaces, was Pennsylvania's first millionaire?
- ... that Cornwall Iron Furnace in Pennsylvania is the only intact charcoal-burning iron blast furnace on its original plantation in the Western Hemisphere?
- ... that Peter Böhler and other Moravian followers founded the towns of Bethlehem and Nazareth, Pennsylvania?
- ... that Graeme Park is the only surviving residence of a colonial era Governor of Pennsylvania?