In this episode of the popular PBS "Globe Trekker" series, veteran adventurer Justine Shapiro leads a fascinating tour of Argentina that showcases the country's stunning natural beauty, rich cultural heritage and vibrant cities. Shapiro's travelogue covers cosmopolitan Buenos Aires, the massive Iguazu Falls and the desolate beauty of Patagonia. Along the way, she learns the tango and meets Argentina's famous gauchos.