We're often unconvinced by the utility of QR codes, but at least one family has made them worth their while. The Kraays of Alberta, Canada, have managed to carve the world's largest QR code into a corn maze at their farm. Measuring 309,570 square feet, the code is one of a series of annual corn mazes devised by the family, which recently received a certificate from the Guinness World Records team for their efforts. Members of our team have had varying luck trying to scan the code from the angled shot above, but apparently it works much better when flying overhead in a helicopter. See for yourself with the video below.