Parking meters are limited and you need to pay close attention to the posted signs or you may return to find your car has been towed from meters during rush hours. Just like any other major city, you'll need to take common-sense precautions against crime in Washington. Travel in well-lit areas at night, and don't walk alone. Taxis are a good, inexpensive way to get around at night. Use travelers checks, keep your wallet in an inside coat or front trouser pocket.
Tickets are valid only on the day issued.
All of Washington's national monuments are open 24 hours a day. The 14 Smithsonian Museums and the National Zoo are open daily, except Christmas. There are plenty of free summer festivals, outdoor concerts and special tours in the Washington area. N.W. The center offers free brochures, interactive information kiosks, souvenirs, restaurant information and tickets are available for tours and events. The closest metro stop is Federal Triangle.