Yarrangobilly Caves

The Yarrangobilly Caves are located in a 12-kilometre-long (7.5 mi) karst region along the Yarrangobilly River valley in the north of Kosciuszko National Park, New South Wales, Australia. Discovered to British colonists by a cattleman, the Yarrangobilly Caves system includes several independent limestone caves formed over different time periods, from several million to a few hundred thousand years old. The older examples are in higher strata and have more speleothem decoration. The caves are administered by the National Parks and Wildlife Service. Three lit show caves are regularly open to visitors, two for guided tours and the third for a self-guided tour. The caves complex also includes a 20-metre-long (66 ft) and up to 2.5-metre-deep (8 ft) 27 °C (81 °F) thermal pool, fed by natural warm-water springs, and a number of walking tracks.

Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).