Sand Dunes

They're hills or small mountains made entirely from very small grains of sand that are formed by the wind and can move for tens of meters during major desert storms but still never leave their known areas! They've fascinated many non-Saharan people as the most exotic if not dangerous of all desert landforms! Myths have been told about them and offroaders —in their shining armored 4x4s— have feared them for long.