Introduction
The District of Columbia is the federal capital district of the United States — a compact area on the Potomac carved out of Maryland in 1790, laid out by Pierre L'Enfant the following year, and the seat of government since 1800. It is coextensive with the city of Washington, which means the District has no separate geography of its own; what it has instead is a metropolitan region spilling across two state lines, and that region is the subject here.
Overview
Read as a region rather than a city, Washington is a three-jurisdiction place: the District itself, the Maryland counties to the north and east, and Northern Virginia across the Potomac — locally the DMV, and functionally one metropolitan area of some six million people served by a single transit system. The city as a destination, with the Mall, the Smithsonian and the memorials, is covered in its own guide. What the region adds is everything within a day of it, and the range is unusual for an American capital. Directly across the river in Virginia sit Arlington's national cemetery, the colonial port streets of Old Town Alexandria, and Mount Vernon on its bluff above the Potomac. North and east in Maryland lie Annapolis, a colonial capital and naval town on the Chesapeake, and Baltimore's harbour an hour up the road. West, the land climbs into the Blue Ridge, where Shenandoah National Park runs a hundred-odd miles along the crest with a scenic drive down its spine and the best autumn colour within reach of the eastern seaboard. And inside the District itself, two things belong to the region rather than to the tourist city: the plan and the height limit that give Washington its unmistakable low, wide skyline, and the diplomatic quarter along Massachusetts Avenue.
Discover District of Columbia
Two decisions from two different centuries explain Washington's appearance. The first is the L'Enfant plan of 1791, which laid a system of broad diagonal avenues — each named for a state — across a regular street grid, connecting a network of circles and squares, with the Capitol and the President's House as the two anchors. That is why Pennsylvania Avenue runs at an angle between them, why the city is full of traffic circles, and why the addresses run in quadrants that confuse everyone for the first two days. The plan was refined a century later by a commission that cleared a railway depot and assorted buildings off the Mall to open the long green axis that exists now. The second decision is the Height of Buildings Act of 1910, which caps building heights in relation to the width of the street they face. It is a common misunderstanding that the limit is set by the Capitol dome; the mechanism is the street width, and the effect is the same either way — no towers, a horizontal skyline, and a city where the monuments still dominate the view. It also pushed the region's tall buildings across the river into Rosslyn and out to Tysons, which is why the Virginia skyline looks like a different city.
Ways to Experience This Destination
L'Enfant's diagonal avenues and circles over a grid, and the 1910 act that caps buildings against street width — together the reason Washington has monuments instead of towers.
Sixty-odd missions in Gilded Age mansions along Massachusetts Avenue, the international institutions west of the White House, and the May open-house weekends.
Arlington National Cemetery opposite the Lincoln Memorial, colonial Old Town Alexandria on the water, Mount Vernon's estate, and the Udvar-Hazy aviation hangar near Dulles.
Annapolis's eighteenth-century centre and naval academy, Baltimore's harbour and crab houses, the Eastern Shore towns, and the C&O towpath running up the Potomac.
Shenandoah National Park and Skyline Drive along the crest, Old Rag and Whiteoak Canyon on foot, Harpers Ferry at the confluence, and the October foliage peak.
Regional Notes for the Capital Area
- The District's addresses run in four quadrants — NW, NE, SW, SE — and the same street number exists in each. Always check the suffix; it is the single most common navigation error visitors make here.
- The Metro reaches well beyond the District into both Maryland and Virginia, including Dulles airport, so a car is unnecessary for the inner region — but the mountains, the Eastern Shore and Mount Vernon realistically need one.
- Cherry blossom weeks fill accommodation across the whole metropolitan area rather than just downtown, and the bloom forecast is only published around ten days ahead. Book flexibly if the blossom is the point of the trip.
- Skyline Drive's entrance stations queue on autumn weekends at foliage peak; midweek visits are a different experience entirely.
- Beltway traffic at peak hours is among the worst in the country. Any day trip that crosses the region should be timed to avoid the morning and late-afternoon peaks in both directions.
Cities in District of Columbia
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