Localiz.me is a new Twitter and Google Maps 'find the location' game. The game allows you to set a clue about a location that you can then Tweet to your followers or share on Facebook. Your followers can then try to find your hidden location on localiz.me by zooming in on a Google Map.
You can try to find locations sent to you by your friends or you can try to find any of the locations hidden by localiz.me users. When you zoom in close enough on the correct location a map marker will appear informing you that you have found the correct location.
Here's one to get you going - 'Napoleon's railway journeys to the English capital always end here.' - http://localiz.me/maps?mapid=30