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Caravana de Llamas. For an unforgettable trekking experience, sign on with Caravana de Llamas. You'll lead a team of llamas along trails that have been used for thousands of years. Trips run the gamut from half-day picnics to 10-day adventures: on overnight excursions, you're hosted by the inhabitants of remote mountain huts. Calle Corte and Viltipoco, Tilcara, Jujuy, 4624. 388/495–5326. www.caravanadellamas.com.ar. From 200 pesos.