Wide expanses of Mitchell grass plains and spinifex woodland are protected in this park on the Barkly Tableland, a peaceful place for travellers to rest and ideal for seasonal birdwatching.

The 13,800ha of semi-arid Barkly Tablelands that make up Wiliyan-ngurru National Park are characterised by open eucalypt woodland, spinifex, turpentine wattle shrubland and extensive areas of Mitchell grass plains. A variety of birds including waterbirds and woodland species can be seen in the park at different times of the year.

The Camooweal caves and sinkholes formed when water percolated through 500 million year-old layers of soluble dolomite creating caverns linked by vertical shafts up to 75m deep. Visitors should be extremely cautious around the edge of the sinkholes. Public entry inside the caves is not allowed. A safe viewing area is located at Great Nowranie cave.