Turkish Airlines: QR Flags

Turkish Airlines has added a little gamification by creating a London scavenger hunt. When you find and scan the QR Code, you automatically "check-in" to that flag via the mobile site. To win a ticket to one of Turkish Airlines' 200 destinations, all you have to do is be the one with most check-ins. Those familiar with location based tools like Foursquare would find this a breeze.