The village of CERRO COLORADO, no more than a few houses dotted along a riverbank, nestles in a deep, picturesque valley, surrounded by three looming peaks, Cerro Colorado (830m), Cerro Veladero (810m) and Cerro Inti Huasi (772m), all of which are easily explored on foot and afford fine views of the countryside. The main attraction, though, is the Reserva Cultural Natural Cerro Colorado, home to one of Argentina’s finest collections of petroglyphs, several thousand drawings that were scraped and painted by the indigenous inhabitants onto the pink rock face at the base of the mountains and in caves higher up between 1000 and 1600 AD.

Some of the petroglyphs depict horses, cattle and European figures as well as native llamas, guanacos, condors, pumas and snakes, but few of the abstract figures have been satisfactorily or conclusively interpreted – though your guide will offer convincing theories. The deep depressions, or morteros, in the horizontal rock nearby were caused over the centuries by the grinding and mixing of paints. Of the different pigments used – chalk, ochre, charcoal, oils and vegetable extracts – the white and black stand out more than the rest, but climatic changes, especially increased humidity, are taking their toll, and many of the rock paintings are badly faded. The petroglyphs are best viewed very early in the morning or before dusk, when the rock takes on blazing red hues and the pigments’ contrasts are at their strongest.

There’s also a small, free archeological museum, next to the guard post, with photos of the petroglyphs and native flora.

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