The Nullarbor Plain is a huge area covering 200, 000 square kilometres. It is the largest exposure of limestone bedrock in the world and stretches from Eucla in Western Australia to near Ceduna in South Australia. The Eyre Highway is the only sealed road that crosses the Nullarbor, with it being considered one of the greatest road trips in the country. The full stretch of the Eyre Highway is an incredibly long 1675km from Port Augusta in South Australia to Norseman in Western Australia. However, the section of the highway which crosses the Nullarbor from Ceduna to Eucla is just 493km or approximately five hours of driving. There are plenty of things to see and do on the way if you have extra time, with well-spaced roadhouses making convenient places to stay and resupply. The incredibly impressive Bunda Cliffs and Head of Bight are the absolute must-sees, but there are also other places to explore including Yalata, Eucla and Balladonia on the highway.