Yordas Cave features an interesting subterranean waterfall in a small chamber in the far right corner of the cave; as viewed from the cave entrance. The waterfall is relatively easy to access, provided you have enough light to move into the cave away from the entrance. You will probably get quite wet.
The waterall chamber is accessed through a rectangular, door like breach in the calcite wall of the main chamber, around 60cm from the floor. The waterfall is found to issue from an opening high above the back of the chamber, cascading almost vertically into a clear pool about 30cm deep. It is possible to walk through the pool and get a cold soaking at the foot of the fall, if you don't mind the cold water.
The floor of the pool is comprised of rounded pebbles of varying sizes as may be found in a stream bed. The water in the pool is crystal clear.
It would appear that this water source is responsible for carving the caves out of the rock initially; before depositing calcite in the form of stalactites and stalagmites that eventually grew to join in the middle forming a continuous wall of calcite sealing the waterfall chamber.