Sweat trickles down the face of a man busking in a steamy town square. Buenos Aires is now relatively cheap to visit A young woman paints the final brushstrokes of a summertime cityscape. Gaggles of children giggle by the lakeside in a gloriously green park. This is Buenos Aires: So pretty, so elegant and so European that it has often been described as the "Paris of South America". Before Argentina's economic crisis struck in 2001, Buenos Aires was probably the most expensive city in South America: $1 bought you one peso. Now it gets you three, allowing visitors to experience...