(The Commonwealth of Virginia gave land south of the Potomac, including the town of Alexandria, Virginia, however Virginia retroceded its portion in 1846).
The Chesapeake Bay nearly bisects the state and the counties east of the bay are known collectively as the Eastern Shore. The Patapsco River includes the famous Thomas Viaduct and is part of the Patapsco Valley State Park.
C., which sits on land that was originally part of Montgomery and Prince George's counties and including the town of Georgetown, Maryland.
This land was ceded to the United States Federal Government in 1790 to form the District of Columbia.
Maryland has shale formations containing natural gas, where fracking is theoretically possible.
So prominent is the Chesapeake in Maryland's geography and economic life that there has been periodic agitation to change the state's official nickname to the "Bay State", a nickname that has been used by Massachusetts for decades.
The highest point in Maryland, with an elevation of 3,360 feet (1,020 m), is Hoye Crest on Backbone Mountain, in the southwest corner of Garrett County, near the border with West Virginia, and near the headwaters of the North Branch of the Potomac River.
Close to the small town of Hancock, in western Maryland, about two-thirds of the way across the state, there are 1.83 miles (2.95 km) between its borders.
This geographical curiosity makes Maryland the narrowest state, bordered by the Mason–Dixon line to the north, and the northwards-arching Potomac River to the south.