These are displayed in addition to numerous traveling exhibits. The National Museum of African Art is known for its architecture as well as its renowned collection. The rooftops of these two neighboring museums meet behind the Smithsonian Castle to form the Enid A. Haupt Memorial Garden, the world s largest rooftop garden. The use of public transportation in Washington is recommended as free parking is limited and posted times are enforced. Taxis also are convenient.
Every subway station is equipped with an elevator and most with escalators.