Nambung National Park, Nature reserve in Shire of Dandaragan, Australia.

Nambung National Park is a nature reserve featuring thousands of limestone pillars called the Pinnacles Desert, alongside heathland and coastal dunes. The landscape is defined by distinctive limestone formations that shape the terrain across a vast area.

The park was established in 1994 by consolidating three separate reserves that had been individually designated between 1956 and 1968. This consolidation created a unified protection strategy for the limestone formations and coastal landscape.

The name Nambung comes from an Aboriginal word possibly meaning crooked or winding, used in 1938 for the river that vanishes into a limestone cave system. The Yued people are the acknowledged traditional custodians of the land. The Pinnacles Desert Discovery Centre presents exhibits on the area's cultural and natural heritage.

The Pinnacles Desert Discovery Centre offers information about the geology and nature of the area, while marked trails guide visitors through the limestone landscape. The paths allow you to explore the formation at your own pace and reach various viewpoints.

The thrombolites at Lake Thetis are built by cyanobacteria and are among the few living examples of such microbial structures; fossil thrombolites in the park have been dated to 3.6 billion years. A boardwalk at the lake lets visitors see them without disturbing the formations.