The new Picasa Web Albums added a web based game called “Where in the World”. Your mission is to find the correct location for some photos that are already geolocated. To find the game, go to http://picasaweb.google.com/lh/explore and click on “Start Game”. As you can see, the screenshot shows Google Chrome, which has been released. The browser is promoted on Google's homepage and you can install it at google.com/chrome, but only if you use Windows XP or Vista. It has a very simple interface and it's incredibly fast.)

Source:→ Google System