Mapping and Geotagging

Guess where you are in the world and get points depending on how close you were: http://www.geoguessr.com
Turn on and off layers of information from volcanic eruptions to global time zones: http://education.nationalgeographic.co.uk/education/mapping/interactive-map
Test your knowledge of where countries are located: http://www.geographyzone.com/new/index.php?t=1&b=1