Rio de Janeiro's mosaics not just for decoration anymore
The iconic black-and-white tiles that decorate the sidewalks of Rio de Janeiro aren't just for looks anymore. The city is using them to create QR codes (two-dimensional barcodes, short for Quick Response) tourists can scan with a mobile device to access information about popular tourist attractions. The first tile mosaic QR code was installed in January at Arpoador rock at the southern end of Rio de Janeiro.
Image 1 of 4