Caiguna Blowhole - WA

The Caiguna Blowhole is located 5 kilometres west of Caiguna and 10 metres from the Eyre Highway. The blowhole is well signposted and will provide a relaxing and interesting road stop. Blowholes are formed on the Nullarbor after years of chemical and physical weathering of the limestone bedrock. As high and low pressure weather systems pass along the Nullarbor, the hole breathes in and out – hence the name blowhole. Reverse air flows are caused by the pressure differences between the underground caverns and the air pressure above ground. Tracks lead back into bush campsite clearings. There are no facilities here.