Longboats are normally used. Depending on the water level, the boat ride may take about half an hour to 45 minutes. During the dry season the boats may have to be pushed through the shallow parts of the river. The water of the stream linking the Melinau River with the caves is normally quite clear. The Clearwater Cave is known to be 107 kilometres long and claimed to be the largest in South East Asia.
Tourists often visit only a small portion at the mouth of the cave.
Within this area they can see the Lady's Cave. The Lady's Cave has fine limestone formations. The other passage which is at the left of the cave which is easily accessible to visitors, leads to an underground stream. Along this passage visitors can see intricate formations about 100 metres above them. This underground river leads to other caverns and passages.