Namibia, Namib Desert, Sossusvlei, Desert sand dunes with lone tree in the foreground.

Namibia, Sossusvlei, Sand dunes and clay pan in The Namib Desert.

Namibia, Desert Sand dunes.

USA, Arizona, Monument Valley, A hot air balloon flying over the red sand dunes at Sand Springs during Balloon Festival in the Navajo Tribal Park.

Qatar, General, Empty desert landscape.

Qatar, General, Gulf desert empty landscape.

Denmark, Nordjylland, Rabjerg Sand Dunes, North West Coast. Stretch of golden sand dunes with grasses growing along ridges.

Denmark, Nordjylland, Rabjerg Sand Dunes, North West Coast. Stretch of golden sand dunes with thick tussocks of grasses in foreground.

England, Suffolk, Southwold, Beach Huts on the edge of the dunes.

England, Suffolk, Southwold, Beach Huts on the edge of the dunes.

England, Suffolk, Southwold, Beach Huts on the edge of the dunes.

England, Suffolk, Southwold, Beach Huts on the edge of the dunes.