Florida Avenue, marking the southern boundary of Adams Morgan and Columbia Heights, is more than a street. It traces the Atlantic Seaboard Fall Line, the geographic boundary between the rolling Piedmont Plateau and the flat Tidewater coastal plain. Above Florida Avenue, the District climbs sharply uphill. The escarpment running along 13th Street just north of Florida Avenue, behind Cardozo High School, offers one of the best views back across the Mall - the Capitol dome and the Washington Monument seen from twenty stories of natural elevation. The same fall-line gradient produced the spectacular cascading fountains and stepped terraces of Meridian Hill Park, designed by architect Horace Peaslee between 1914 and 1936 and officially renamed Malcolm X Park by the District in 1969 (though the official federal designation remains Meridian Hill). The park's thirteen-basin Italian Renaissance cascade is the longest of its kind in North America. On Sunday afternoons the park's central lawn hosts the long-running Meridian Hill drum circle, an unbroken tradition since the early 1970s.

By the early 1980s, 18th Street between Columbia Road and Florida Avenue had emerged as one of Washington's most active nightlife strips. The bars and clubs opened in former rowhouses; outdoor patios spilled onto sidewalks; live music venues stayed open until the District's two AM closing time on weeknights and three on weekends. Madam's Organ - the legendary New Orleans-themed blues bar with a large painted mural of a redhead on its facade that the city has periodically tried to require be repainted - has been a fixture since 1992. The jumbo slice is the area's specific late-night staple: enormous, greasy, foldable pizza slices sold for around eight dollars apiece at Pizza Mart, Jumbo Pizza, and Pizza Boli's. None of the jumbo slice places, locals will tell you cheerfully, makes good pizza. That is not the point. The point is that at 2:30 in the morning you can hold a fourteen-inch slice in your hand while walking back toward Columbia Road, and the night will not end until you have done so.

Three blocks west of 18th Street, the neighborhood of Mount Pleasant runs north along the eastern edge of Rock Creek Park. About eleven thousand people live there, and Mount Pleasant Street's small shops, bars, and restaurants serve primarily Latin American food. About a quarter of the neighborhood's residents identify as Hispanic, and Mount Pleasant has been the cultural center of Washington's Salvadoran community since the 1980s - when the civil war in El Salvador (1980-1992) sent waves of refugees north and many settled here, joining earlier migrants. The Washington metropolitan area is now home to the second-largest Salvadoran population in the United States, after Los Angeles. The food specialty is the pupusa - thick corn tortillas stuffed with cheese, loroco (a Salvadoran flower bud), squash, pork, or refried beans, then topped with curtido (pickled cabbage) and a tangy red salsa. They cost about a dollar fifty each at most pupuserias and take ten minutes to cook to order. Atoles - corn-and-spice porridges that drink somewhere between a milkshake and pumpkin pie - are the cold-weather Salvadoran specialty.

Columbia Heights, immediately east of Mount Pleasant, was one of the neighborhoods devastated by the April 4, 1968 riots that followed Martin Luther King's assassination. The 14th Street commercial corridor burned. Most businesses never returned. For thirty years, Columbia Heights remained one of the District's most disinvested neighborhoods - high unemployment, vacant storefronts, low property values that nonetheless rose slowly as gentrification crept north from Dupont Circle. The Columbia Heights Metro station opened on September 18, 1999. The DCUSA shopping center opened on its eastern edge in 2008 - the largest retail development inside the city limits, with Target, Best Buy, Marshalls, and Bed Bath and Beyond bringing big-box retail back to a neighborhood that had been without it for forty years. The Tivoli Theatre, an Italian Renaissance Revival movie palace built in 1924 and closed for decades, was restored in 2005 as the home of the GALA Hispanic Theatre. The neighborhood's transformation since 1999 has been one of the most dramatic in any American city - and remains, as in all such transformations, contested.

Each of the three neighborhoods - Adams Morgan, Mount Pleasant, and Columbia Heights - has its own Cultural Tourism DC heritage trail, marked by 18 poster-sized street signs at key historical sites. The Adams Morgan Heritage Trail covers murals and former meeting halls; the Mount Pleasant trail follows the area's Latin American immigration history; the Columbia Heights trail traces the neighborhood's transformation from a Victorian streetcar suburb to a Black middle-class community to a post-riot district to today's gentrifying corridor. The murals themselves are unmissable. Painted on rowhouse end walls and the sides of commercial buildings, they range from the politically charged - Madelyn Ribble's portrait of Cesar Chavez at 14th and Belmont - to the celebratory, such as the long-running 'Songs of Adams Morgan' mural sequence by G. Byron Peck. The neighborhoods are best experienced on foot. Walk 18th Street on a Saturday morning before the bars open; walk Mount Pleasant Street on a Sunday afternoon when the pupuserias fill with families. Half the city's life is happening in those few square blocks.