Located in the North West of Argentina, the Quebrada de Humahuaca is one of the major tourist sights. The colonial architecture and the barren landscape will remind the traveler of Peru and Bolivia.
The town of Humahuaca is located on the Rio Grande, at an elevation of 3000 meter. There are a few nice old churches like the Iglesia de la Candelaria and the famous clock tower in the cabildo on Plaza Gómez, but for most travelers Humahuaca serves as a base for exploring the region. Climb the steps to the Monumento a los Héroes de la Independencia for the best view in town, and don't miss the day trip up to the Serranía de Hornocal — the fourteen-coloured ridge that is the main draw of this whole stretch of the Quebrada. The pre-Inca terraces of the Pucará de Coctaca are another rewarding excursion just north of town.
Tilcara is worthwhile, it has a few museums and the pre-Hispanic pucara is well worth a visit as well. A few kilometers to the south the hillside cemetery of Maimara is a great photo opportunity.