STS079-783-026 Baltimore, Maryland, USA September 1996 Downtown Baltimore (center of the picture) is easy to identify as the focal point where numerous highways (light-colored lines) come together. This expansive highway network and the extensive urban area places Baltimore within Megalopolis, one of the world's largest populated land corridors, extending from Boston (MA) to Richmond (VA). Although the infrastructure of the port facilities can not be observed on this small scale image, the proximity of Baltimore Harbor to Chesapeake Bay illustrates that Baltimore's economy, at least in part, is tied to the fishing industry as well as seagoing international shipping and commerce. The intersecting runways of Baltimore-Washington International Airport are visible south of the downtown area. Two noted highway bridges are visible: the Francis Scott Key Bridge at the mouth of Baltimore Harbor and the Chesapeake Bay Bridge northeast of Annapolis.