The Judbarra/Gregory National Park covers an area of around 13'000 square km in the transition zone between tropical and semi-arid regions of the Northern Territory. The Park lies within the Victoria River region and contains tropical-desert transition environments, tablelands, escarpments, gorges, mesas, karst formations and numerous caves. The Bullita cave system is one of the longest in the southern hemisphere with over 100 km of surveyed passages.
Newcastle Range in Judbarra/Gregory National Park.
The stamp was issued in the series "Wilderness Australia II".