Dubuque Postcards.  Experience the old Mississippi river town of Dubuque through this extensive collection historic postcards. Organized by type of building or place.  Although it has no map, it does include seventeen birds eye views. By Tracy O'Meara.   [ccr]
http://www.dubuquepostcards.com/index.php

Historic Homes of LeClaire.  Features drawings of homes of Mississippi River pilots and other prominent people of the mid-nineteenth century, and a simple map.  [ccr]
http://www.leclaireiowa.gov/Tourism/river_pilots.htm

Historic views of Davenport.   A map-free collection of historic photos and postcards, from Special Collections at the Augustana College Library.  Also includes Rock Island and Moline, Illinois.  Select from among the Quad Cities Views. [ccr]
http://www.augustana.edu/library/special/index.html

The Grant Wood Neighborhood in Cedar Rapids.  An interesting site containing historical profiles of people who played a role in Wood's life and photos of their residences, along with a simple map. [ccr]
http://www.mebbs.com/gwood/  

Hardin County.   From a clickable map, view descriptions and photos of sites on the Historic Register in this north-central Iowa county.  Also on this site are features on agriculture, preservation, settlement, and transportation.  From the National Park Service.   [ccr]
http://www.cr.nps.gov/nr/travel/hardin/map.htm 

Historic Amana Colonies:  Descriptions and photos of sites on the Historic Register, accessible through a very active map.  Also on this site are features on utopias in America, origins of the Amana Colonies, communial Amana, and the Colonies today.  From the National Park Service.  [ccr]
http://www.cr.nps.gov/nr/travel/amana/mainmap.htm 

The Mississippi River flood of 2001.  Photos of the flood in the communities of Lansing, Dubuque, Bellevue, Sabula, and Clinton.  [ccr]
http://www.draves.com/2001flood/index.htm

Nineteenth Century Mississippi River scenes.  A classic series of landscape photos taken by Henry Bosse between 1882 and 1892, with nice descriptions of each photo.  Assembled by Roald Deiss of the Corps of Engineers.   [ccr]
http://www.mvr.usace.army.mil/Bosse/Bosse.htm

First Railroad Bridge to Crosss the Mississippi.  A pictorial history, with maps,  of this 1856 bridge and the three bridges that subsequently replaced it.  Inlcluded is the current Government Bridge between Rock Island and Davenport, which was built in 1896.   Created by Curtis C. Roseman and hosted by River Action, Inc.  [ccr]
http://www.riveraction.org/nuke73/modules.php?name=News&file=article&sid=35

Big River Virtual Tour.  Vignettes on segments of the Upper Mississippi, including some photos of the river, from Big River Magazine. Prepared in anticipation of the 2004 Grand Excursion.  [ccr]
http://www.big-river.com/grandexcursion.html

Buck Creek and Walnut Creek.  This site evaluates alternative futures for agricultural watersheds, focusing on biodiversity and water quality.  From multi-institutional study funded by the U. S. Environmental Protection Agency.
http://bufo.geo.orst.edu/tc/firma/ip/index.html

Conrad Environmental Research Area.  Tour this protected area near Grinnell, reserved for research by Grinnell College faculty and students.   A map-based virtual tour and a historical tour are included.   Created by Grinnell College.  [ccr]
http://www.grinnell.edu/academic/biology/cera/tour/

An Online Tour of Dubuque.  Annotated pictures of the city and its environs. Recommended by James C. Orvis. [tdh]
http://dubuque-tour.tripod.com/

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

Upper Misissippi Valley Digital Image Archive:  Search for images from the 19th and early 20th Century in Davenport and Muscatine, among other places in eastern Iowa and northwestern Illinois.  This is a cooperative venture among several institutions in the region.  [ccr]
http://www.umvphotoarchive.org/