Algeria, Tassili n'Ajjer

At the heart of the Sahara, Tassili n'Ajjer dominates the top of its steep cliffs, the desert, beyond the oasis of Djanet, extends to infinity such a calm or troubled ocean. Sandstone plateau extensively eroded by thousands of years of rain, it offers its grandiose landscapes, always renewed, with its canyons, major wadis, but also its massive sandstone evoking dead cities, stone forests, castles fortified, and once covered large areas of savannah vegetation type, enabling environment for abundant animal and human life. Thus this plateau is the largest museum in the world open ... Pierre Colombel evokes for us rock paintings and engravings that tell us "before the Sahara desert. "

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