Texas

National Parks and Natural Landscapes.  Nice clickable map leads to photos and descriptions of natural attractions in southwest Texas.  Links provided to similar sites for Arizona, California, New Mexico, Nevada, and Utah.  Created by John Crossley.   [ccr]
http://www.americansouthwest.net/texas/map.html

Geological history of Big Bend.   An excellent virtual field trip by geologists at Texas A&M University.
http://geoweb.tamu.edu/faculty/herbert/bigbend/intro/index.html#loc

Texas highways.   Photos, maps, and historic maps of highways and freeways all over the state.  [ccr]
http://www.texasfreeway.com/default.shtml

Downtown Abilene.  A clickable map leads to photos and historic information on twenty-six buildings and other sites. From the Abilene Historic Preservation Division.  [ccr]
http://www.abilenetx.com/About/map.htm

U. S. Highway 90 Postcards.  Drive the "The 'Southern' Route 66" across Texas, Louisiana, Mississippi, Alabama, and Florida through historical images of the road and roadside facilities.  From the UCM Museum.  [ccr]
http://ucmmuseum.com/hwy90tx.htm

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

Perry-Castañeda Library Map Collection.   Excellent map collection from the University of Texas Libraries, featuring maps from locations worldwide as well as Texas.   [ccr]
http://www.lib.utexas.edu/maps/