The Spatial History Project at Stanford University is a place for a collaborative community of scholars to engage in creative spatial, textual and visual analysis to further research in the humanities.
CLIO explores how historians, photographers, journalists and artists enhance and deepen our knowledge of the past by engaging history from a variety of perspectives.
Digital Collections
VCDH- Historical topics provided by the Virginia Center for Digital History
NYPL- Digital Collections contains historical images, maps, posters.
Library of Congress has maps, images, sound and film- as well as a great flickr account!
Museum Resources
Smithsonian Museum : Images, sound recordings, historical documents in American history.