This high-altitude town, in the beautiful Quebrada de Humahuaca Valley, is a popular tourist attraction that reminds the visitor that Argentina shares a border and an indigenous cultural heritage with Bolivia. Walk the narrow cobblestone streets and visit the folklore museum and the Church of the Candelaria (nice paintings from the Cuzco school).

Visit the town square at noon, when the mechanized figure of St. Francis comes out of the town hall clock (to see the show, get there early—the old clock doesn't keep perfect time). In Uquia, just 6 mi/10 km south, visit the Templo Santa Cruz y San Francisco, built in the 1690s (it has some excellent art). At Coctaca, 6 mi/9 km to the northeast, there's a large archaeological site and a nearby Indian village. 880 mi/1,415 km northwest of Buenos Aires.