4D World Heritage Mulu Caves
Sarawak, East Malaysia, Borneo

Sarawak’s massive limestone outcroppings are honeycombed with caves, carved over millions of years by the run off from tropical downpours. The world’s most extensive cave system so far discovered is in the Mulu National Park. So far, 310 kilometres of passages have been surveyed and this is thought to be only one third of the passages that exist. Exploration is continuing.
The well-lit and plank-walked Wind and Clearwater Caves are popular with visitors but no serious deep exploration has been done of other limestone formations.
