A five-week descent from the Pacific to the end of the road. We leave Lima for desert oases and Nazca skies, climb into the Colca Canyon, trace the shores of Lake Titicaca into Bolivia, swing east to Brazil’s Pantanal, cut through little-visited Paraguay, and return to the high country for the Salar de Uyuni before the long Patagonian run via Chile’s Carretera Austral to Torres del Paine and a finish in Ushuaia.