Mulu is a place that defies description; it must be felt. A UNESCO World Heritage site, it is a labyrinth of limestone cathedrals hidden under a primary rainforest canopy so dense it creates its own weather.

Within the Clearwater Cave, an underground river hums with a power that has carved the earth for millennia. But nothing prepares you for the Sarawak Chamber, the largest natural cave chamber on the planet. Its scale is terrifying and majestic; it is vast enough to hold 40 jumbo jets in a silent, stone embrace. As evening falls, the mouth of the Deer Cave becomes the stage for the "Great Bat Exodus." Millions of free-tailed bats emerge in a rhythmic, spiraling ribbon of life, dancing against the velvet twilight in a spectacle that has occurred every night for thousands of years. For those who crave the heights, the trek to the Pinnacles of Mulu reveals razor-sharp limestone spires piercing the jungle mist, a landscape so surreal it feels like a fragment of another planet.