The Delaware Valley has towns that were founded by the Dutch, towns that were founded by the British, towns that were founded by the Swedes. There are towns built on a great river, towns built on a great road and a town built on a not-so-lofty hill. The Philadelphia area has towns built on flour, towns built on iron, towns built on opium-based medicines. Heck, the Delaware Valley even has a town built on mushrooms.There is no better way to see Delaware...