Washington is known worldwide for the dome of the U.S. Capitol, the rotunda of the Jefferson Memorial and other signature architectural achievements. But the landscapes that surround those iconic structures -- park lands and open urban spaces -- are also a vital part of the city's identity. Architect and Washington Post columnist Roger K. Lewis returns to discuss how landscapes shape the face of Washington, and the challenge of maintaining them.
Photo Gallery: Notable Landscapes Of Washington, D.C.
From green spaces like the Smithsonian Haupt Garden and Kenilworth Park to concrete monuments such as the Air Force Memorial, the American Society of Landscape Architects has recognized a diversity of noteworthy city landscaping.