Brunswick, Maryland, USA

The Potomac River in Merriam-Webster's Geographical Dictionary, 3rd ed., 1997, p. 951: "River; E U.S. in West Virginia, Virginia, and Maryland; formed by the confluence of N branch and S branch; flows E and SE to form West Virginia-Maryland and Virginia-Maryland boundaries and empties into Chesapeake Bay; 287 mi." [2021]