Twyfelfontein, officially known as ǀUi-ǁAis, is a site of ancient rock engravings in the Kunene Region of north-western Namibia. It consists of a spring in a valley flanked by the slopes of a sandstone table mountain that receives very little rainfall and has a wide range of diurnal temperatures.
A sandstone slab at Twyfelfontein. The animals are the older engravings, overlaid by the circles.
Rock painting of a man
Rock engraving of a giraffe
Giraffe and cattle
In archaeology, rock art is human-made markings placed on natural surfaces, typically vertical stone surfaces. A high proportion of surviving historic and prehistoric rock art is found in caves or partly enclosed rock shelters; this type also may be called cave art or parietal art. A global phenomenon, rock art is found in many culturally diverse regions of the world. It has been produced in many contexts throughout human history. In terms of technique, the four main groups are:cave paintings,
petroglyphs, which are carved or scratched into the rock surface,
sculpted rock reliefs, and
geoglyphs, which are formed on the ground.
Reclining Buddha at Gal Vihara, Sri Lanka, where the remains of two columns to support the structure that originally enclosed it is visible
Nanabozho pictograph, Mazinaw Rock, Bon Echo Provincial Park, Ontario, Canada
Buddhist stone carvings at Ili River, Kazakhstan
Aboriginal rock painting of Mimi spirits in the Anbangbang gallery at Nourlangie Rock in Kakadu National Park.