Call it the QR code from Ipanema.
Yes, it's true: While most Americans haven't got a clue what a QR code is, let alone how to use one, Brazilians have long loved them. So much so that now, they're embedding them in pavement.
Why? To educate tourists on what the city has to offer.
Still, as popular as they are, this seems a little optimistic. The chances of QR codes even being around 10 years from now seem small. And let's face it - there are a lot better things to train one's camera phone on in Rio.
But what do you think: A mobile age twist beachside mosaics? Or a stone-cold bad idea?
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