Nebraska

Historic Chadron.  Photos and brief descriptions of many historically significant structures in this western Nebraska town, with maps.  [ccr]
http://www.chadron.com/history/map.php

Downtown Lincoln.  Hundreds of photos are accessed by navigating from place to place.  Includes the state capitol.  [ccr]
http://db.4w.com/lincolntour/ 

Aerial tour of Omaha.  Dozens of aerial views from all over town, indexed in a variety of ways including a clickable map.  Although clicking on some of the images leads to promotional Web sites, it is possible to simply browse the images, imagining you are flying at low altitude over this Missouri River metropolis. Created by Steve Adams.  [ccr]
http://www.novia.net/~sadams/Omaha_Pages/Photo_Catalog/Photo_Map.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

Union Pacific Grand Excursion of 1866.  The story of the excursion to the 100th meridian with stereoscopic views by John Carbutt.  Click on "Union Pacific Archives in Omaha," near the bottom of the page, for more Carbutt stereo views of the event.  By the National Stereoscopic Association, Inc.  [ccr]
http://cprr.org/Museum/Stereo_World/Carbutt/