Possibly the oldest caves in the world – it is determined that the clay sediments of the caves are approximately 340 million years old. 10 caves opened for tourism. Length of passages exceed 40 km and there are more than 300 entrances.
| Location, GPS coordinates: | 33.8194 S 150.0237 E |
| Categories: | Caves, Geographical extremes |
| Values: | Geology, Visual |
| Rating: |  (3.5 / 5) |
| Where is located? | Australia and Oceania, Australia, New South Wales, Westmoreland County, Oberon, Jenolan |
