Placespotting.com - A Google Maps Game

Placespotting is a cool Google Maps Mashup which is about finding places on a Google map.

You get a picture of a place somewhere on earth and have to find this place on a movable Google map. You can also create new "map-riddles" for your friends.

The game started in Switzerland and has already more than 5000 riddles stored and more than 500,000 people tried to solve a riddle.