Stock photography, photos: Namibia: Rock art at Twyfelfontein Stock photos of Rock engravings of animals and human footprints at Twyfelfontein in Namibia Photograph: © Robert Preston Click for a larger image and more information Keywords associated with this stock photo: rock, engraving, bushman, art, carve, stone, ancient, twyfelfontein, namibia, southern, south, western, africa, detail, archeology, animal, carving, travel, tourist, attraction, damaraland, orange, brown, old, simple, outline, illustration, giraffe, human, foot, print, footprint