What did the United States look like before the Civil War? When did Texas secede from Mexico? What portion of the country was bought up through the Louisiana purchase? A new web site now gives teachers the ability to instill a love of maps—and the history they represent—in their students, while teaching them valuable geography and cartography skills. The David Rumsey Historical Map Collection focuses on rare 18th and 19th century North and South America cartographic history materials—but the collection also includes historic maps of the world, Europe, Asia, and Africa. Categories include old and antique atlas, globe, school geography, maritime chart, state, county, city, pocket, wall, children’s, and manuscript maps. The collection is available over the web using a standard web browser such as Explorer or Netscape, but a special browser designed for researchers also can be downloaded. The maps can be viewed by country, state, publication author, or keyword.