Australia is home to four large deserts, popularized by Mad Max: Sturt's Stoney Desert, Tanami Desert, the Great Victoria Desert and the Simpson Desert, which is also known as 'The Big Red' due to the presence of dunes of red sand. The Simpson Desert is an erg which contains the world's longest parallel sand dunes. These north-south oriented dunes are static, held in position by vegetation. They vary in height from 3 metres in the west to around 30 metres on the eastern side. The most famous dune, Nappanerica, or, more popularly, Big Red (named by Simpson Desert traveller Dennis Bartell), is 40 metres in height.

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