For all of you music buffs, this is alledgedly the birthplace of the Argentinian Tango. La Boca is a colorful neighborhood in Buenos Aires where a statue of Carlos Gardel is in display. Tango fanatics keep a lit cigarette for him at all times, held by the statue's hand. (at least when I was a kid). One of the streets its called El Caminito, featured in some tangos and just the mention of it will bring some tears to some tango afficionados.
Links: ripioturismo.com, www.tripadvisor.com