The Portugal thread reminded me of this little gem. I think it's been posted here once or twice before, but I think we've got enough new people running about now that we can do it again. A collection of geography quizzes can be found at Lizardpoint here, with a wide range of materials ranging from American states and European states to Russian republics and Pakistani provinces, territories, and tribal areas. It's a lot of fun to do this kind of stuff once in a while, so I'll start off with a couple.
European countries: 144/144
European capitals: 116/117 (easier than it could have otherwise been, due to matching; silly little Balkan statelets)
Middle East countries: 74/75 (mixed up Kyrgyzstan and Tajikstan)
African countries: 150/162 (ah~, sooo humiliating)
United States states: 150/150
German states: 45/48 (I confused Nieder-Sachsen with Sachsen and Anhalt, which is kinda silly)
French regions: 62/66 (thankfully not departments)