These are wonderful. "Located at the top of a sandstone outcrop in the Air Mountains in the Sahara is the unique & exceptional petroglyph of two life-size giraffes. The petroglyph is thought to have been created between 10,000 and 8,000 years ago. The site itself contains 828 engraved images [704 animals, in majority bovids, giraffes, ostriches and antelopes, rare lions and rhinos and camels, 61 human figures, and 159 indeterminate figures]."
Why aren't these better known?