Tassili n’Ajjer is a vast plateau in south-east Algeria at the borders of Libya, Niger and Mali, covering an area of 72,000 sq. km. The exceptional […]
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Horseshoe Canyon, USA Petroglyphs
The Great Gallery in Horseshoe Canyon petroglyphs are some of the oldest rock carvings in United States of America. Their origin is estimated in Archaic period, […]
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