"A Free Map Quiz Game for Windows: Seterra 3.0 is a challenging, educational geography game with 70 different exercises. Learn about countries, capitals, flags, and cities in Africa, Europe, South America, North America, Asia, and Australia using outline map exercises."
U.S.A. Geography -- Learn about states, capitals, geographic regions, lakes, rivers, and other bodies of water. Choose your level: Beginner, Intermediate, Expert, etc. Other links on this site as well.