The cave contains a number of water features which make it extremely difficult to explore, such as large waterfalls, ponds, dripstone pools, sumps, and siphons. The flow rate fluctuates with the season, from over 700 litres per second during most of the year to approximately 500–600 litres per second during the slower-flowing summer season. Because of this, summer is the only time when it is possible to explore the cave. The water temperature is around year-round, which means that divers must wear thick protective clothing when exploring flooded areas of the cave. The air temperature in the majority of the cave system is .
