Article Photos: Brazil: bar codes on sidewalks give tourist info 4/4

A two-dimensional bar code, or QR code, as they're known, made from black and white stones covers a sidewalk near the beach in Rio de Janeiro, Brazil, Friday, Jan. 25, 2013. The QR codes are being placed at tourist spots which can be scanned with a mobile device for information about the site. (AP Photo/Silvia Izquierdo)