This is the main attraction in La Boca, Buenos Aires's original Little Italy. A pedestrianized street a few blocks long with a colorful, kitschy collection of painted houses known as conventillos (flimsily built houses that immigrants lived in), it's lined with art displays explaining the history of the area. Untold numbers of tacky T-shirt and souvenir vendors and artists set up stalls here and cater strictly to tourists. To be honest, I find this area repulsive and insulting to visitors to Buenos Aires. The history of La Boca is very important to Buenos Aires and the development of the tango. However, what remains here today has little to do with any of that. Even the touristy name of the street "Caminito" has nothing to do with Buenos Aires at all. It's from a song about a flower-filled remote rural village, not an intensely urban neighborhood where Italian-immigrant gangsters, prostitutes, and sailors once roamed the streets committing crimes and other acts of mayhem. To top it all off, in the summertime, the stench from the polluted port can also be simply overwhelming.
Come to Caminito if you must, and if you're on a tour, you will anyway. However, if you are on a very short stay in Buenos Aires, skip La Boca. For true authenticity and a flavor of old Buenos Aires, visit San Telmo instead.