Many caves are located in the Cape K=Leeuin Naturaliste National Park. While three of these caves are electrically lit, two with guided tours and one self-guided, there are othes which are explored wearing a hard hat and headlamp. I did not explore these, but I did venture into Mammouth Cave and Lake Cave.
Mammouth is self guided, so there is as much time as you need for photography; however, tripods are not allowed. This made photography difficult but possible using the railing in corners where the camera could be suppported. This limited the selection of subjects to those near the corners of platforms. In Lake Cave it was more difficult, as I was part of a large group. The only useable images were made with the camera placed on teh edge of the platform.
The caves are quite beautiful, lit as they are with yellow and redish lights. Using flash revealed the true color to be more whitish or grey, what would be expected for limestone. Thin tubes are formed as mineral laden water drips through a tube, adding material to the end of the tube. In Lake Cave, the main feature is actually suspended above the surface of the water. The base was originally attached to the bottom of the cave lake, which was disolved over time and lowered.