Utah

National Parks and Natural Landscapes.  Nice clickable map leads to photos and descriptions of twenty-three natural attractions all over the state.  Links provided to similar sites for Arizona, California, New Mexico, Nevada, and Texas.  Created by John Crossley.  [ccr]
http://www.americansouthwest.net/utah/map.html

John Wesley Powell's Survey of the 1870s.   Follow Powell along the Green and Colorado Rivers.  Maps and fantastic photos, including many stereo pairs that can be viewed in stereo if the viewer is properly equipped.  From the USGS.  [ccr] 
http://3dparks.wr.usgs.gov/3Dcanyons2/ 

Historic Fort Douglas.   A clickable map leads to photos and historical descriptions of this Salt Lake City military facility, which dates back to the Civil War era.   Named after Illinois Senator Stephen A. Douglas, most of the facility is now part of the Univesity of Utah.  [ccr]
http://www.facilities.utah.edu/fd/welcome/welcome.html

Upper Sevier River Journey.   Take a map-based virtual tour of this southern Utah watershed.   Excellent maps and nice panoramas, which requrie QuickTime for viewing.  From the Upper Sevier Community Watershed Project.   [ccr] 
http://www.uppersevier.net/ijourn.html

Route 6.  A map-based tour of the longest U. S. transcontinental highway, put together by three geographers and supported by Augustana College.  Includes a history of the route and scores of photos of scenes along the route from Provincetown, at the tip of Cape Cod in Massachusetts, to Long Beach, California.  [ccr]
http://www.augustana.edu/academics/geography/department/route6/index.html

Digital Atlases, Searchable Digital Archives, and Other Sites Useful for Exploring Places