Riddler - Geosense

Back in 1996 when I thought the net was just for chatting and playing games, one of the first sites I visited on a regular basis was Riddler.com. They still run some of their Classic games, like Drag Race and Scrambler and have added several new ones like Geosense where you race to find the given city on a World map. You can also play Europe and US map versions. For geography nerds like me, it's a dream come true.