Outstanding collection of online maps, local, national, international, and historical. Also try the "Cartographic Reference Resources," which leads to many useful geographic tools, such as gazeteers, distance calculators, and time zones.
This is actually part of the above site, from U.T. Library. It lists dozens of links to a variety of map-related Web sites all over the world. An excellent resource.
An interactive map from the U.S. Geological Survey. Different "layers" can be added to view such features as biology, land use, etc.
The above 3 commercial sites (Google, Mapquest, and Yahoo) let you input data or to select from lists and see a maps or written directions. Information on U.S. is the most thorough. Most useful for travel directions, not for academic projects.
Offers both political and physical maps of the countries of the world or of the entire world.
Large collection of online historical maps from the world's largest library. Divided into seven categories or you can search by keyword.
Printable maps that just show the outlines of countries and states.
From the U.S. Government. All sorts of U.S. maps. Use the list near the top of the screen to select the kind of map, such as biology or transportation, and get a list of specialized maps.
State maps from satellite pictures. There are relief maps showing geological features and maps with the county outlines overlaid. There are also historic maps from 1895 for each state. From Johns Hopkins University.
Maps of individual countries and of UN missions, such as Darfur.
Historical maps, mainly the Americas from 18th and 19th Centuries.
Maps of the U.S. coasts from the National Oceanic and Atmospheric Administration (NOAA). Search by place name or by using a map.
This site lets you search several different online collections of old maps. A slide bar lets you narrow by time periods.
Why not have some fun with maps? Several games to test your cartographic knowledge.
Here, information can be found on topics including The USGS National Map, national datasets used to build The National Map which are available to the public (3DEP and Landsat for example), and the mapping of our environment and natural resources by USGS scientists. There is also historic and contemporary information about how data is collected and how maps are made.
Printable maps that just show the outlines of countries and states.