Pennsylvania has many reminders of its industrial heritage. A stoll through Pittsburg's Strip District - a once bustling steel manufacturing center - takes you by merchants selling poultry, popcorn and Steelers gear. A visit to the Steelstacks in Bethlehem is now the dramatic setting for music festivals and art exhibitions. And in Philadelphia, a neighborhood once dominated by the Reading Railroad and the Stetson Hat factory is now the site of Fly School Circus Arts, a trapeze-training center. But from money and motorcycles to chips and chocolate, Pennsylvania still has a rich industrial scene open to visitors to experience factory tours and purchase a Keystone State keepsake from your travels.