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Photo: David Bjorgen, CC BY-SA 3.0 via Wikimedia Commons
The most-visited museum in the U.S., with over 8 million visitors per year, this impressive repository covers the history of human flight, rocketry and space flight. It contains thousands of impressive artifacts, including the Wright brothers' 1903 Flyer, Lindbergh's Spirit of St. Louis, Apollo 11's command module Columbia, and the simulated bridge of an aircraft carrier. Enthusiasts should try to also make it to the Udvar-Hazy Center of the National Air and Space Museum out in Chantilly near Dulles International Airport; the Center houses full aviation and space aircraft (e.g., SR-71 Blackbird, Enola Gay B-29, Concorde, Space Shuttle Discovery, etc.) that would not fit on the Mall.
The National Air and Space Museum (NASM) of the Smithsonian Institution is a museum in Washington, D.C., United States, dedicated to human flight and space exploration.
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Home to D.C.'s premier collection of international modern and contemporary art, housed in an intimidating brutalist spaceship of a building. The exhibits are wonderfully stimulating and cutting-edge, albeit often not made accessible to casual viewers (a free docent-led tour available noon-4PM can be helpful), and very often not family-friendly with very graphic content. The museum tries to make it clear when you are about to walk into an "adult exhibit," but do not count on this if you are with children. The sculpture gardens, however, are great fun for kids, and a nice quiet escape from the Mall proper. And this modern sculpture collection of several Rodins, a huge Lichtenstein brushstroke, and other famous works, is world-class!
This museum displays the cultural traditions of the Native peoples of North, Central, and South America. It focuses on 20th century and present day culture much more than pre-Columbian and colonial periods. The exhibits can be fascinating, but are not as grandiose as those of the other museums. Perhaps the most important attraction is the gorgeous building itself, designed by famous Native Canadian architect Douglas Cardinal of Blackfoot descent, echoing the ancient stone formations of the American Southwest, and surrounded by manifestations both metaphorical and literal of natural North American landscapes.
The staggering depth and breadth of the world-class collections here are a clear testament to U.S. wealth and power. The east building of this museum is devoted to modern art, while the west building showcases traditional, mostly European, paintings and sculptures. The west wing's impressionist gallery is likely the most popular, although it would be a shame to skip the east wing's fauvist and abstract expressionist galleries. Just west of the buildings is the relaxing sculpture garden, with a foot pool for cooling off tired feet. There are dining options within the Gallery. Among popular options are the Garden Café and various dining options in the area connecting the east and west wings of the museum. Also, food is available in the park on the Gallery grounds.
This beautiful building was the first major museum on the mall, built as the National Museum in 1881 to house the Smithsonian's earliest collections. The collections have since been moved to the Natural History and American History museums, but the building still does host occasional exhibits (and serves as office space for the Smithsonian).
A relaxing place just outside the National Gallery of Art to enjoy the fresh air, listen to music, and enjoy the surroundings, including a view of the National Archives building. Take a break from skating to enjoy hot cocoa or a meal at the Pavilion Café, next to the skating rink. Note that the sculpture garden itself closes M-Sa 5PM, Su 6PM, and access after that time is restricted to the ice rink only.
Summer open-air jazz concerts at the National Gallery of Art Sculpture Garden. Hugely popular, and a great time if you don't mind the crowds. Get there early.