Experienced Diver + Cave Advanced & Cave SpecialtyNot for the faint hearted. Same beautiful dive as the cavern, but go beyond the fresh water lake and it becomes a true cave dive. Venture beyond the fresh water inland lake, explore a little, say hello to Nobby the Gnome, then take the wicked drift dive - courtesy of the current created by the fresh water coming down from the mountains - back to the exit point, This cave system stretches some 15 kilometres back inland (none of our team has gone this far - yet!) under the mountain. 