Article One, Section Eight of the United States Constitution grants the United States Congress "exclusive jurisdiction" over the city. The Capitol Complex, Library of Congress, and Supreme Court Building are located here.
With cobblestone streets and townhouses, Northwest Washington is an upscale hub of shops and pubs. The George Washington University Hospital is located here.
A triangle enfolding many smaller districts, Northeast Washington is home to the US National Arboretum, with 446 acres of gardens and tree-lined paths.
Just on the other side of the Potomac, you'll find The Pentagon. Arlington is considered to be the second-largest "principal city" of the Washington metropolitan area.