Stephen Belcher / Camelthorn Acacia (Acacia erioloba) dead tree with dunes in background, Namib-Naukluft National Park, Namibia

Stephen Belcher / Sand dunes, Namib-Naukluft National Park, Namibia

Jouan & Rius / Shadow of a Camelthorn tree (Acacia erioloba) in Tsauchab valley, Namib Naukluft NP, Namib desert, Namibia

Jouan & Rius / Ripples in the sand dunes, Namib-Naukluft NP, Namib desert, Namibia

Jouan & Rius / Nara melons (Acanthosicyos horrida) on sand dune, Namib Naukluft NP, Namib desert, Namibia

Jouan & Rius / Welwitschia (Welwitchia mirabilis), Namib Naukluft NP, Namib desert, Namibia

Jouan & Rius / Aerial view of Tsauchab valley, Namib Naukluft NP, Namib desert, Namibia

Richard Du Toit / Gemsbok (Oryx gazella) running, Namib-Naukluft National Park, Namibia

Richard Du Toit / Thick-tailed Scorpion (Buthidae) walking on sand dune and casting a shadow, Namib-Naukluft National Park, Namibia

Richard Du Toit / Aerial view of Gemsbok {Oryx gazella gazella} galloping across sand dunes, Namib Naukluft Park, Namibia

Richard Du Toit / Aerial view of Ostrich {Stuthio camelus} running across sand dunes, Namib Naukluft Park, Namibia

HUW CORDEY / Aerial sand dunes, Sossusvlei, Namib Naukluft NP, Namibia, 2005 From BBC Planet Earth series

Tony Heald / Aerial view of sand dune landscape, Namib Naukluft NP, Namibia

Richard Du Toit / King cricket leaving tracks on sand {Mimnermidae} Namib Naukluft Park, Namibia

Richard Du Toit / Scorpion crossing sand dune leaving tracks {Scorpiones} Namib Naukluft P, Namibia

Gerry Ellis / Star dune formations, Namib-Naukluft National Park, Namibia

Gerry Ellis / Aerial view of star dune formations, Namib-Naukluft National Park, Namibia

Andrew Parkinson / Quiver tree {Aloe dichotoma} view up through canopy Namib-Naukluft NP, Namibia 2004

David Noton / Sand dunes in the Namib-Naukluft NP, Namib desert, Namibia, Southern Africa

David Noton / Sand dune base and tree. Namib-Naukluft NP, Namib desert, Namibia, Southern Africa

David Noton / Sand dunes in the Namib-Naukluft NP, Namib desert, Namibia, Southern Africa

Jose B. Ruiz / Giant sand dunes. Namib-Naukluft NP, Namib Desert, Namibia, Southern Africa

David Noton / Sand dunes in the Namib-Naukluft NP, Namib Desert Namibia, Southern Africa

David Noton / Sand dunes in Namib-Naukluft NP, Namib Desert, Namibia, Southern Africa

Jose B. Ruiz / Giant sand dune Sossus Vlei, Namib-Naukluft NP, Namib desert, Namibia, Southern Africa

David Noton / Petrified trees, Deadvlei, Namib-Naukluft NP. Namib desert, Namibia, Africa

Andrew Parkinson / Quiver tree {Aloe dichotoma} at dawn with sun rising Naukluft NP, Namibia

Jouan & Rius / Person running through sand leaving footprints behind, sand dunes in the Namib-Naukluft NP, Namib desert, Namibia

Theo Allofs / High grass on savanna after heavy rains during rainy season, Namib-Naukluft National Park, Namib Desert, Namibia

Theo Allofs / Dirt road across savanna, Namib-Naukluft National Park, Namib Desert, Namibia

Stefan Huwiler / Sand dunes at last light. Sossusvlei, Namib Naukluft National Park, Namibia, Africa.

Charlie Summers / Wild Horses (Equus caballus) rearing up and fighting in dominance behaviour. Horses from different groups fight when they inevitably meet at waterholes. Namib-Naukluft National Park, Namibia, Septembe...

Charlie Summers / Mustang (Equus caballus) herd following the leader in single file as they approach the only water for them in the Namib-Naukluft National Park of Namibia near Garub, Southern Africa

Gerry Ellis / Dust devil racing across dry river valley, Namib-Naukluft National Park, Namibia

Gerry Ellis / Northern edge of sand dune formation blocked by Kuiseb River, Namib-Naukluft National Park, Namibia

Gerry Ellis / Aerial view of transverse sand dunes, Namib-Naukluft National Park, Namibia

Guy Edwardes / Namaqua chameleon (Chamaeleo namaquensis) standing on rock, Namib-Naukluft National Park, Namib Desert, Namibia, April

Chris Gomersall / Spindrift in the Namib Desert, Sossusvlei, Namib Naukluft National Park, Namibia, Africa, November

Chris Gomersall / Southern oryx / Gemsbok (Oryx gazella) in the Namib Desert, Sossusvlei, Namib Naukluft National Park, Namibia, Africa, November

Ingo Arndt / Sand dune, Namib Desert, Namib-Naukluft National Park, Namibia

Ingo Arndt / Tourists climbing a sand dune, Namib Desert, Namib-Naukluft National Park, Namibia

Ingo Arndt / Sand dune, Namib Desert, Namib-Naukluft National Park, Namibia

Stephen Belcher / Sand dunes, Sossusvlei, Namib-Naukluft National Park, Namibia

Stephen Belcher / Camelthorn Acacia (Acacia erioloba) dead trees with dunes in background, Namib-Naukluft National Park, Namibia

Stephen Belcher / Sand dune with sharp ridge line, Namib-Naukluft National Park, Namibia

Stephen Belcher / Camelthorn Acacia (Acacia erioloba) dead tree with dunes in background, Dead Vlei, Namib-Naukluft National Park, Namibia

Stephen Belcher / Camelthorn Acacia (Acacia erioloba) dead tree with dunes in background, Namib-Naukluft National Park, Namibia

Stephen Belcher / Sand dunes, Namib-Naukluft National Park, Namibia

Stephen Belcher / Camelthorn Acacia (Acacia erioloba) dead tree with dunes in background, Dead Vlei, Namib-Naukluft National Park, Namibia

Stephen Belcher / Camelthorn Acacia (Acacia erioloba) dead tree with dunes in background, Dead Vlei, Namib-Naukluft National Park, Namibia

Stephen Belcher / Camelthorn Acacia (Acacia erioloba) dead trees with dunes in background, Dead Vlei, Namib-Naukluft National Park, Namibia

Stephen Belcher / Sand dunes with a line of trees in the foreground, Namib-Naukluft National Park, Namibia

Stephen Belcher / Camelthorn Acacia (Acacia erioloba) dead trees with dunes in background, Dead Vlei, Namib-Naukluft National Park, Namibia

Stephen Belcher / Camelthorn Acacia (Acacia erioloba) dead tree with dunes in background, Dead Vlei, Namib-Naukluft National Park, Namibia

Stephen Belcher / Camelthorn Acacia (Acacia erioloba) dead trees with dunes in background, Dead Vlei, Namib-Naukluft National Park, Namibia

Richard Du Toit / Fairy circles, Namib-Naukluft National Park, Namibia

Solvin Zankl / Looking up into the branches of a Quiver tree (Aloe dichotoma) Namib-Naukluft NP, Namib Desert, Namibia

Michele Westmorland / Sand dune landscape, Sossusvlei, Namib-Naukluft National Park, Namibia, World Heritage Site

Michele Westmorland / Aerial view from a hot air balloon tour over the dunes and desert, Sossusvlei, Namib-Naukluft National Park

Michele Westmorland / Tree dwarfed by the world's tallest sand dunes, Sosussvlei, Namib-Naukluft National Park, World Heritage Site, Namibia

Michele Westmorland / Skeleton trees in Dead Vlei Sossusvlei, Namib-Naukluft National Park, Namibia, World Heritage Site

Michele Westmorland / Aerial view from a hot air balloon tour over the dunes and desert, Sossusvlei, Namib-Naukluft National Park, Namibia Fish-eye lens

Michele Westmorland / Aerial view from a hot air balloon tour over the dunes and desert, Sossusvlei, Namib-Naukluft National Park, Namibia, Fish-eye lens

Michele Westmorland / Aerial view from a hot air balloon tour over the dunes and desert, Sossusvlei, Namib-Naukluft National Park

Michele Westmorland / Aerial view from a hot air balloon tour over the dunes and desert, Sossusvlei, Namib-Naukluft National Park

Michele Westmorland / View of valley at sunset, Sossusvlei, Namib-Naukluft National Park, Namibia

Michele Westmorland / Hot air balloon tour for tourists over the dunes and desert, Sossusvlei, Namib-Naukluft National Park, Namibia

Michele Westmorland / Guide preparing evening drinks for tourists as they watch the sunset, Sossusvlei, Namib-Naukluft National Park, Namibia

Jouan & Rius / Sand dunes in the Namib-Naukluft NP, Namib desert, Namibia

Jouan & Rius / Rain storm in Namib Naukluft National Park, Namibia

Michael & Patricia Fogden / Kuiseb River dividing dunes from gravel plains of Namib Desert, Namib-Naukluft National Park, Namibia

Michael & Patricia Fogden / Kuiseb River dividing dunes from gravel plains of Namib Desert, Namib-Naukluft National Park, Namibia

Michael & Patricia Fogden / Camelthorn Acacia (Acacia erioloba) trees among sand dunes at Sossus Vlei, Namib-Naukluft National Park, Namibia

Michael & Patricia Fogden / Sand dunes near Sossus Vlei, among the highest in the world, Namib-Naukluft National Park, Namibia

Jouan & Rius / Kriess-se-rus tableland with dried vegetation, Namib Naukluft NP, Namib desert, Namibia

Jouan & Rius / Sand dunes in the Namib-Naukluft NP, Namib desert, Namibia

Jouan & Rius / Close-up detail of ripples in the sand dunes, Namib-Naukluft NP, Namib desert, Namibia

Jouan & Rius / Sand dunes in the Namib-Naukluft NP, Namib desert, Namibia

Jouan & Rius / Dollar-bush (Zygophyllum stapfii), Namib Naukluft NP, Namib desert, Namibia

Jouan & Rius / Sossusvlei surrouned by sand dunes with vegetation growth after heavy rain, Namib-Naukluft NP, Namib desert, Namibia

Jouan & Rius / Dollar-bush (Zygophyllum stapfii), Namib Naukluft NP, Namib desert, Namibia

Jouan & Rius / Sand dunes in the Namib-Naukluft NP, Namib desert, Namibia

Jouan & Rius / Rainbow over sand dunes with dark rain clouds behind, Tsauchab valley, Namib-Naukluft NP, Namib desert, Namibia

Jouan & Rius / Ripples in sand dunes in the Namib-Naukluft NP, Namib desert, Namibia

Jouan & Rius / Petrified trees in Deadvlei, Namib Naukluft NP, Namib desert, Namibia

Jouan & Rius / Sand dunes in the Namib-Naukluft NP, Namib desert, Namibia

Jouan & Rius / Sand dunes in the Namib-Naukluft NP, Namib desert, Namibia

Jouan & Rius / Female Welwitschia (Welwitchia mirabilis) cones, Namib Naukluft NP, Namib desert, Namibia

Jouan & Rius / Sand dunes in the Namib-Naukluft NP, Namib desert, Namibia

Jouan & Rius / Male Welwitschia plant (Welwitchia mirabilis), Namib Naukluft NP, Namib desert, Namibia

Jouan & Rius / {Stipagrostis sabulicola} grass on a sand dune, Namib Naukluft NP, Namib desert, Namibia

Jouan & Rius / Scarce vegetation on the sand dunes, Namib Naukluft NP, Namib desert, Namibia

Jouan & Rius / Detail of ripples in sand dunes in the Namib-Naukluft NP, Namib desert, Namibia

Jouan & Rius / Female Welwitschia (Welwitchia mirabilis) cones, Namib Naukluft NP, Namib desert, Namibia

Jouan & Rius / Pied crow {Corvus albus} in the Sossusvlei dunes, Namib Naukluft NP, Namib desert, Namibia