A Southern oryx, or Gemsbok, and its young offspring cross the gravel plains beneath a huge red dune at Sesriem in the Namib-Naukluft Park. This thick-necked antelope with long, straight horns is a desert species and will survive without water for long periods in dry areas.In early morning and late afternoon the dunes at Sesriem are breathtakingly beautiful. Patterned by, and shifting with, the wind, they vary from brick red to apricot and forever change colour with the angle of the sun. The largest rise dramatically 1,000 feet above the surrounding plains and are said to be the largest dunes in the world; they are certainly the most picturesque.