sign of the unesco desert at twyfelfontein world heritage ng,

adventure africa afrikaans ancient antelope art beautiful bushman carving cave center concept culture damaraland desert drawing dry elephant engraving engravings exploration heritage horizontal landmark monument mound mountain namibia natural nature outdoors painting pattern petroglyphs plaque prehistoric red rock sandstone season sign site sky souvenir spectacular spring stone symbol termite travel twyfelfontein uncertain unesco vintage visitor wall wild wildlife world