While everyone's favorite link is down temporarily, try this website that has a lot of similar games to build your geography skills.
Build your skills identifying continents, countries, cities, flags, and more!
Several games designed to build and quiz your geographic knowledge, often with stunning visuals.
Use these quizzes to build your knowledge of geographical features, country locations, and much more.
Use these quizzes to help build your knowledge of people, places, and events in the past, among other things.
Figure out where you are in the world using this GoogleMaps-integrated game.