National
Archaeology
Advisory Council on Historic Preservation
Laws, Regulations, and Standards Related to Cultural Resources (NPS)
United States Army Enviromental Center
American Memory Historical Collections for the National Digital Labrary
The Secretary of the Interior's Standards for the Treatment fo Historic Properties
Historic American Buildings Survey/Historic American Engineering Record
The American Civil War Homepage (has links to any and all aspects of the war)
The Making of America (a digital library of American primary sources from Cornell University)
Documenting the South (a digital library of primary sources from the American South)
Great source of Seamless USGS data
a great interactive map where you can control Layers of USGS data
Preservation Directory (a directory of over 1,300 preservation organizations)
Core Historical Literature of Agriculture
Making of America Books & Journals
Mapping Links
Terraserver (for location aerial photos)
Mapquest.com (for getting directions)
emaps Plus (vector based maps very cool but limited areas)
GIS Data Depot (Great resource downloading quads and GIS data)
David Rumsey Map Collection (over 8000 maps online)
Hargrett Rare Map Collection at UGA
Lazardtech (download Mr. Sid Viewers and Software)
Program that downloads large areas from microsoft terraserver
listing of topographic maps from which you can get the reference info
av terra software (arcview extension that downloads terraserver maps in to archview)
great historic coastal and civil war era maps
Topozones place to find quads of the us and you can serch by utm and decimal degree
Download National Register GIS and Database info
Google Earth (for aerials and extruded terrian of the world)