An interesting panel of geometric designs and an engraving of a mythical figure - half animal, half human - at the extensive site of Twyfelfontein's 5,000 rock engravings or petroglyphs.Twyfelfontein, or 'Doubtful Spring', has a small perennial spring, which from time immemorial would have attracted a large number of wild animals and created an ideal environment for San hunters who left their mark in this sprawling rock-strewn site about seven thousand years ago. Purros