Turkish Airlines transformed national flags into QR codes and created QR Flags. They placed these QR Flags on digital bus shelters all over London and added a little gamification on top of it by turning it to 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 round trip to one of Turkish Airlines’ 200 destinations, all you have to do is be the one with most check-ins
