Take the A subway and get off at Puan. Walk a few blocks along Av. Rivadavia, turn right on Emilio Mitre, Walk four blocks to corner of Emilio Mitre and Av.Jose Bonifacio. You'll probably see folks already standing in line to catch this free tram. The ride is about 20 min., punctuated in the middle with a description (in Spanish) of these old trams, after which one of the motormen presents calendars, key chains, mugs, etc.for purchase to support these old trams. A calendar is 150 pesos. We love old trams/trains anyway and this was a good way to walk around a different neighborhood. Limited hours, only Sat. and Sun.