The University of Georgia's Rare Map Collection at the Hargrett Library, an outstanding collection of internet-accessible historical maps, including maps of the Western U.S. and the "frontier" period.

The University of Virginia Library's online exhibit, "Exploring the West from Monticello: A Perspective in Maps from Columbus to Lewis and Clark."

Travel the Highway of the Devil by four-wheel-drive vehicle.

The Illustrating Traveler

TIGER Mapping Service "Coast to Coast" Digital Map Database.

Maps of the United States

Aerial photographs of Several Regions

Map Machine from National Geographic

Geography - Welcome from The Mining Company

Earth Sciences & Map Library Home Page

Rare Map Collection

Bruce M. Gittings at the University of Edinburgh's index of WWW servers of GIS mapping sites.

The Center for Advanced Land Management Information Technologies (CALMIT) at the University of Nebraska-Lincoln provides lots of information on mapping technologies.