The only way to get from Perth to Adelaide is via the Eyre Highway. This highway is approximately 1700 kilometres long and crosses the Nullarbor Plain. It stretches from the town of Norseman in Western Australia to the town of Port Augusta in South Australia.
Eyre Highway is named after Edward John Eyre who was the first English explorer to traverse the Nullarbor Plain by land, with indigenous tracker Whylie, in the nineteenth century. Sculptures of both these men have been erected on
Whites Knob Lookout in Kimba as a tribute.

Sculptures of Edward John Eyre and Whylie at Whites Knob Lookout
The highway is unique in that it consists of a section known as the 90 Mile Straight. Believe it or not, this 146.6-kilometre section between Balladonia and Caiguna is Australia's longest straight stretch of road without a single turn. It is also regarded as one of the longest straight roads in the world. So don't forget to stop for a photo when passing through. Its signposts can clearly be seen at both ends.

Signpost at Balladonia end

Signpost at Caiguna end