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Photo: APK is like a firecracker. He makes it hot., CC BY-SA 3.0 via Wikimedia Commons
Opened in 1941, this is an auditorium, arena, big top and ballroom that can hold 10,000 people. It features events such as games of the DC Rollergirls.
The D.C. Armory is a mixed armory and 10,000-seat arena in Washington, D.C. Managed by the Events DC, the Armory opened in 1941, as the headquarters, armory, and training facility for the District of Columbia National Guard. In 1994, it became a venue for a broad range of sports and public events. The Armory is adjacent to Stadium–Armory station and the former RFK Stadium and future New Stadium at RFK Campus.
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A library, performance venue, and a museum all rolled into one. The library is the single most impressive feature—it houses the largest collection of the Bard's works in the world—although the library itself is geared towards researchers, not travelers. The Shakespearean performances here are top-notch, and occasionally outshine the bigger Shakespeare Theatre Company in the East End (although the performances here can be more uneven). There are also frequent lectures, musical performances, etc., which can be a good excuse to visit. The small museum has a replica of Shakespeare's Globe Theatre, and an Elizabethan garden in the back, and is nice to visit combined with a performance.
The home of the Supreme Court, the highest court in the land, charged with interpreting the Constitution and protecting equality and justice for all. The Neoclassical building, just opposite the Capitol, was constructed in 1935; until then, the Court met in various locations in the Capitol. The imposing facade, with its lofty portico, Corinthian columns, and wide marble staircase, is familiar from TV news as the place where spectators, protesters, and journalists gather to witness the defining rulings of our generation. The court is in session from October to April, with oral arguments heard M-W. If you want to see an argument, you have two options: line up in front of the building to hear the entirety of the day's arguments, but there is another line, often shorter, for those who only wish to hear a three-minute sampling of the case. The rest of the year, public lectures are held every hour in the courtroom. The spiral staircases on the sides of the court room are beautiful and impressive parts of the building not to be missed. Other things to see, besides the courtroom itself, are the Great Hall, with its long line of busts depicting former Chief Justices, and the Lower Great Hall below it, where you can watch a short film about the Court and see a stone and aluminum sculpture of the legendary Warren Court, as well as a statue of John Marshall, the Chief Justice who established the Supreme Court as we know it.
Founded by the third U.S. president, Thomas Jefferson, this grand building, also called the Jefferson Library, has the largest collection of books in the world. The most popular points of interest are the massive main reading room and Great Hall. On the Winter and Summer solstices, the Great Hall is filled with an odd silver glow that gives the impression you are surrounded by floating clouds, and this makes those days the most crowded. The main reading room is known as the Sacred Room, and is absolutely stunning. You must be 16 or older to use the reading rooms and have a reader identification card, which can be obtained by presenting a driver's license/passport and completing a self registration form. Guided tours will not bring you into the reading room, but will take you up in the dome, where you can see the room in its full glory. There are also a number of rotating exhibitions from the Library's vast collection on display at any one time, as is a Gutenberg Bible.
Not just a train station or metro stop, the grandiose 1908 Beaux Arts building by legendary American architect Daniel Burnham makes it worth a look—the ceremonial entrance is stunning. Open long after the museums close, it contains shops and restaurants. A large monument to Christopher Columbus stands outside the building.