101 Independence Ave SE, Washington, DC, United States
The national library of the United States, this library houses one of the largest and most important collections of books in the world. Among the 130 million items held at the library is one of only four perfect vellum copies of the Gutenberg Bible. For visitors the Library offers tours, in addition to a rotating collection of some of the most interesting exhibits in Washington. Be sure to check online http://www.loc.gov/loc/events/index.php for the latest information on the collections and exhibits at the library. Viewing the great halls and spaces of the library is an experience that should not be missed on any visit to Washington, DC.