Chester County’s history as a transportation hub and an early industrial and commercial center depended on its geography. On the map below for your reference, from Chester County, the reddish watersheds empty into the Schuylkill River, the bluish ones directly into the Delaware River, the pale-colored ones in the center into the Christina River (which flows into the Delaware 2 miles from Wilmington), and in the southwest, into Chesapeake Bay, whether via the Susquehanna River (greenish) or directly (purplish).