Return southwards to the Augrabies Falls National Park, with its thundering falls and lunar landscapes, then east across to Upington beside the Gariep (Orange) river, centre of the Green Kalahari, to white water raft and visit a winery there. Follow through to Grobbelaarshoop, then on to Witsand Nature Reserve, where 60m high white sand dunes ´roar´ when the wind blows. In Griquatown, Postmasburg and Danielskuil, see natural sink holes, an 800 000 year-old cave, and San rock art sites; before choosing to travel into the North West Province, or exit the Northern Cape via the fascinating diamond city of Kimberley.