The Nullarbor is one of Australia’s iconic natural places. It’s renowned as a vast and mostly treeless plain. But hidden beneath this ancient landscape is an immense network of caves.

Drone image of the Bunda Cliffs, where the Nullarbor Plain meets the Great Australian Bight. Layering in the cliffs represent different limestone units.

Drone image of the Bunda Cliffs, where the Nullarbor Plain meets the Great Australian Bight. Layering in the cliffs represent different limestone units. Credit: Dr Matej Lipar. Drone image of the ...