Here is an unusual QR campaign from Sport Klahsen in Aschendorf, Germany. The upmarket store has its own climbing wall and indoor running track where you can try out equipment and sportswear before you buy, so advertising with a novel climbing apparatus is not so implausible. They raised a park bench 10ft into the air and suspended a QR Code from it at eye level (video below). The QR Code resolved to a mobile site with a code for a 10% discount voucher. The QR Code was scanned 3,720 times and 30% redeemed the voucher, not a bad conversion rate!