McPherson Square Metro Stop. Changing of the Guard at the Tomb of the Unknown Solider is every hour on the hour and every half hour during the summer months. Arlington National Cemetery Metro Stop. Housed in a conservatory with soaring ceilings. Stop by during cold weather for a warm stroll through collections of tropical, semi-tropical and desert plants, or just linger near the pools and streams.
Group tours are available with advance reservations.
A hands-on museum where children and adults can learn, explore and have fun. Farragut West Metro Stop. Both are closed on Federal Holidays. Children under 12 - Free. Foggy Bottom Metro Stop.