Weebubbie Cave, near Eucla in Western Australia, is a culturally significant site to the Mirning people. Weebubbie Cave was formed millions of years ago and is the deepest cave in the Nullarbor, which itself is made up of the largest continuous block of limestone in the world. The lakes of Weebubbie Cave are filled with water so crystal clear that visibility has been measured at depths greater than 150 metres.
Australia 2017, Weebubbie Cave.
The stamps were issued in the series "Caves".