The Library of Congress - Digital Collections

There is an AMAZING online collection of digital materials at the Library of Congress.

Photos above are from the panorama section. Click to enlarge.

From the website:

The Library of Congress has made digitized versions of collection materials available online since 1994, concentrating on its most rare collections and those unavailable anywhere else. The following services are your gateway to a growing treasury of digitized photographs, manuscripts, maps, sound recordings, motion pictures, and books, as well as "born digital" materials such as Web sites. In addition, the Library maintains and promotes the use of digital library standards and provides online research and reference services.

The Library provides one of the largest bodies of noncommercial high-quality content on the Internet. By providing these materials online, those who may never come to Washington can gain access to the treasures of the nation’s library. Such online access also helps preserve rare materials that may be too fragile to handle.

http://www.loc.gov/library/libarch-digital_new.html