Gunung Mulu National Park in Borneo has the largest and most spectacular caves in the world system. Unique network of caverns beneath the Gunung Mulu National Park, in Sarawak, Borneo, holds the record for the largest room (enclosure Sarawak), the most voluminous system (Clearwater) and the widest passage (Cave deer) of all chains caves of the world. Many of the caves are illuminated, and visitors can see the waterfalls high up to 180 meters inside them. Every evening, more than a million bats is placed on the ceiling of the cave, forming a dark cloud impressive.
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