Additional Note: In HTTP/1.1, even though the web browser connects to the same IP address and port, to many web-servers, there is a slight difference between localhost and 127.0.0.1. Depending what is in the address bar, your browser will send a request header field with either Host: localhost or Host: 127.0.0.1 in it.
Washington DC Museum Free Days. Most Washington, DC museums are Free seven days a week. Crowds and parking are always an issue in the Capitol, so some planning and patience will make your visit more enjoyable. Also, see transportation and parking info below the list.
Smithsonian Museums in Washington, DC. History, science, art and culture come alive at these DC museums. Collectively called the Smithsonian Institution, this world-renowned museum and research complex in the District consists of 17 museums, galleries and a zoo. Explore and learn about everything from the origins of man and the future of flight to the history of art across multiple continents with nearly 140 million objects, works of art and specimens to discover.