1. Washington DC, United States.
Panorama of Washington DC.

2. Localisation
Washington, District of Columbia ; is located in the north bank of the Potomac River and is bordered by the states of Virginia on the southwest and Maryland on the other side.

3. Washington is located in the humid subtropical climate zone.
Springs and autumns are warm, with low humidity, while winters are cool and summers are hot and humid.

4. Ethnic Makeup of Washington, D.C.
Population
The population is about 6 million inhabitants.
There are more than 50% Black or African Americans, and about 35% Whites.
Ethnic Makeup of Washington, D.C.
White
36.3 %
Black
55,6 %
Asian
3,1 %
Native Americans
0,2 %
Other
4,8 %
Hispanic
8,3 %

5. Washington DC is the capital of the United States.
History
Washington DC is the capital of the United States.
It was founded in July 16, 1790.
The City of Washington was originally a separate municipality within the Territory of Columbia until an act of Congress in 1871 which effectively merged the City and the Territory into a single entity called the District of Columbia.
That's the reason why the city, legally named the District of Columbia, is known as Washington, D.C.

6. The architecture of Washington varies greatly.
The Washington National Cathedral.
Culture
The White House.
The Thomas Jefferson Memorial.
The architecture of Washington varies greatly.
Six of the top ten buildings in the American Institute of Architects' 2007 ranking of "America's Favorite Architecture" are located in the District of Columbia :
the White House, the official residence of the president ; the Thomas Jefferson Memorial ; the Washington National Cathedral ...

7. …the US Capitol, the Lincoln Memorial and the Vietnam Veterans Memorial.
The neoclassical, Georgian, Gothic, and modern architectural styles are all reflected among those six structures and many other prominent edifices in Washington.
The United States Capitol.
The Lincoln Memorial.
The Vietnam Veterans Memorial.