Jujuy, north of Salta, is Argentina’s northernmost province and it shares a rugged border with Bolivia. Life here moves at its own pace: Adobe villages bake beneath multicolored cliffs; llamas wander the foothills; and villagers seek shade under scraggly trees and towering cacti.

The road through the Quebrada de Humahuaca (Humahuaca Canyon) leads to a string of indigenous towns. In Purmamarca, the Hill of Seven Colors (Cerro de Siete Colores) rises behind the town to form a geologic rainbow.

Further on, in the whitewashed town of Humahuaca, visitors are encouraged to gather in the central square just before noon. At midday, a clockwork saint known as San Francisco Solano appears from the church tower, mechanically blessing the assembled pilgrims below.

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