The Smithsonian is the world's largest museum, holding approximately 154 million artifacts and specimens.The Smithsonian Institution Building, more commonly known as the "Castle", is the main and center building for the Smithsonian Visitor Center. In this 19th century building, visitors will be able to view collections of work from each of the museums surrounding the Castle. Visitors make also take note of the extravagant architecture of the museums when touring the Smithsonian Museum.Visit Website Get Directions
1000 Jefferson Dr SW, Washington, DC 20560
8:30am - 5:00pm. Open everyday except December 25.