Washington, DC, the nation's capital, is a compact metropolis on the Potomac River that borders the states of Maryland and Virginia. It has been the nation's capital since 1789. Intense neoclassical monuments and buildings characterize the city's skyline, including the landmark structures that house the federal government's three government institutions: the Capitol, White House, and Supreme Court. As well as notable museums and performing-arts venues like the Kennedy Center, it is also home to the United Nations Headquarters.
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