This is fun. And a productive time-waster. Where On Google Earth is a game using Google Earth. Those that run the site pick a spot on the globe and you are supposed to guess where it is.
From the game web site:
To participate, just make your guess in the comments section for each photo. Guesses will be held until the end of the contest, when they will all be made public. Anything and everything is fair game for getting a correct answer. Each contest will last 2-3 days, so submit your guess as soon as you have an idea.