This site allows you to make a state map with selected counties hilighted
in six different groups, each with a separate color.
http://monarch.tamu.edu/~maps2/
An old favorite is the Hamrick site which shows the distribution of
surnames by state and date.
http://www.hamrick.com/names/index.html
More oldies but goodies from
John Hopkins site offers a useful variety of maps
http://fermi.jhuapl.edu/states/
Site has: Shaded relief map // County
map // Black and white map
Satellite image // 1895 map (Big: 1.82 Mb) // PostScript map
USGNIS
http://mapping.usgs.gov/www/gnis/gnisform.html topozone
Locations of features such as airports, beaches, cape, canal. cemetery,
river, populated place -- by state
and county
http://geonames.usgs.gov/pls/gnis/web_query.gnis_web_query_form
Peabody Museum at Yale appears to have same database.
http://george.peabody.yale.edu/gnis/