According to geologists, the Perry Sandhills originated after an ice age (40,000 years ago) and are formed by wind erosion over thousands of years. The dunes are located six kilometres outside of Wentworth and are a unique land formation of 400 acres of continuously shifting sand dunes.
Skeleton remains of giant mega-fauna (kangaroos, lions, emus and wombats) have been found there. Replicas of these animals are now on show at the Pioneer Museum in Wentworth. Aboriginal tribes used this area to camp and hunt. Evidence of this is still being uncovered as the sands drift.