Buenos Aires, the capital of Argentina, was the most vibrant city I visited during my South American adventure. The main streets such as Florida are full of shoppers all day long. Prices are not cheap in Argentina but if you have US dollars, you can take advantage of the “dollar blue” and get more than 50% above the exchange rate in Argentinian pesos from the money changers on the streets although you do need to look out for counterfeit bills .
Buenos Aires has a lot of narrow streets and is fun to explore. It also has a selection of parks which offer some welcome shade from the sun whilst providing some colour.