The Nullarbor Plain is famous for being hot, dry, flat and featureless – a necessary stretch of very straight road on the way to somewhere else. Few people know about the enormous cave system that lies beneath, and even fewer have explored it.

As Will Murray reports, regular visitors to the caves are concerned a proposed development could put this little-known underground world at risk.

Read more: Beneath the plains of the Nullarbor lies an underground world formed over millions of years