Yarrangobilly Caves, Cave network in Kosciuszko National Park, Australia

Yarrangobilly Caves is a network of underground chambers carved into limestone within Kosciuszko National Park. The system contains multiple passages decorated with natural formations such as stalactites, stalagmites, and flowstone deposits along its walls.

The limestone formations originated roughly 440 million years ago when this region lay beneath ancient seas. Over time, water carved these underground chambers into the shape visitors discover today.

The caves take their name from the Yarrangobilly River valley. Leo James Hoad, caretaker from 1919 to 1946, found the Jillabenan Cave in 1910 and showed visitors through the system; Caves House, built in 1901, housed guests when the caves were among New South Wales's most popular resorts.

Three show caves are regularly open: two guided and one self-guided. South Glory runs 470 metres with 206 steps plus ramps; Jersey Cave has 185 metres and 217 steps; Jillabenan is 73 metres with 15 stairs and wheelchair access using the park's fixed-width chair. Unlit caves such as North Glory, Smugglers Passage, Harrie Wood and Castle Cave need tours booked ahead, run daily at Christmas and Easter, minimum eight people, helmets and lights supplied.

Near the caves sits a natural thermal pool that maintains roughly 27 degrees Celsius year-round, allowing swimmers to enjoy a warm bath regardless of the season. This geothermal feature provides a pleasant contrast to the cold cave environment just nearby.