I just learned about a great geography site to help Geography/U.S. History teachers! It is a site from the National Park Service National Register of Historic Places. In addition to the many, many historic places to explore listed (with great maps, photographs, etc.), the newest online travel itinerary is "American Presidents" with a great interactive map of the U.S. Since this is election time, it is a great time to explore past presidents' homes and historically related sites.
Website: http://www.nps.gov/history/nr/travel/

I'm sharing this information from GAW/Dolores of Oklahoma...Thanks!!