One of my favorite activities of 2012 was a graffiti tour in Buenos Aires. I used Graffitimundo, which I was referred to by friends.
Living in Colombia, I grew accustomed to seeing a lot more street art than I ever saw in the USA. And the quality was often excellent.
During the graffiti tour in Buenos Aires, which lasted about two hours, and was conducted around the Palermo Soho neighborhood, we learned about the history and culture of street art in the Argentine capital.
Interestingly, artists can only get in trouble with the police if the property owners report them. And because many residents view the graffiti as real art, they are often OK with their buildings being used as canvasses (especially by the top artists).
I've pulled together some of my favorite scenes from the tour, but this barely scratches the surface of what's on display in just one neighborhood.