Cocklebiddy Cave
Cocklebiddy Cave is a large limestone cave system on the Nullarbor Plain in the Shire of Dundas, Western Australia, near Cocklebiddy Roadhouse on the Eyre Highway. It is one of Australia's longest cave systems, known for its extensive passages, massive chambers and a large permanent underground lake. Formed in the Nullarbor karst, it is significant for speleology and requires permits and specialist caving experience for access, and is not developed for general tourism.