Mulu Caves in Borneo

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Mulu Caves

Explore the world-renowned Mulu Caves, an extraordinary UNESCO World Heritage Site teeming with natural wonders and subterranean marvels.

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Nature’s underground masterpiece

The Mulu Caves, located in the heart of Gunung Mulu National Park, offer a spectacular underground world of colossal caverns, ancient limestone formations, and breathtaking natural beauty. This Borneo UNESCO World Heritage Site is home to Deer Cave, with its record-breaking chamber, and Clearwater Cave, one of the longest cave systems in the world. Witness the awe-inspiring bat exodus at dusk or venture into hidden chambers on guided tours. Above ground, rainforest trails and canopy walkways showcase the park’s rich biodiversity. Whether you’re an adventure seeker or a nature lover, Mulu’s caves and surrounding landscapes promise an unforgettable experience.

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Mulu Caves Highlights

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Deer Cave and Bat Exodus

Explore Deer Cave’s immense chamber and witness millions of bats spiralling into the sky during the iconic evening exodus.

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Clearwater Cave

Discover one of the longest cave systems in the world, featuring subterranean rivers, striking rock formations, and serene crystal-clear pools.

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Adventure Caving

Embark on guided caving expeditions, from beginner-friendly treks to thrilling challenges in Sarawak Chamber, the largest known underground chamber.to rainforest.

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Rainforest Canopy Walk

Stroll along the world’s longest canopy walk, offering spectacular views of the rainforest and opportunities to spot exotic wildlife.

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The Immensity of Deer Cave

Deer Cave is famed for its massive chamber, which can fit dozens of jumbo jets, and is home to millions of bats and swiftlets. The evening bat exodus is a must-see, as waves of bats form mesmerising patterns in the twilight sky. The cave’s interior also features the “Adam and Eve” waterfalls and a natural skylight nicknamed the “Garden of Eden.”

kayaking in Mulu Caves

Clearwater Cave: A Subterranean River Wonderland

Clearwater Cave, part of one of the longest cave systems on Earth, offers an adventure through underground rivers and vast passages. Its crystal-clear pools are perfect for a refreshing dip after exploring the labyrinth of tunnels and limestone formations.

Mulu National Park - Borneo Malaysia

Adventure Caving for Thrill Seekers

For the adventurous, Mulu offers thrilling caving expeditions. Explore hidden passages, crawl through narrow tunnels, or ascend vertical walls in caves like Racer Cave or Lagang Cave. Sarawak Chamber is a highlight for experienced cavers, offering an unparalleled sense of scale and challenge.

limestone pinnacles at Mulu National Park Borneo

Best Time to Visit

The best time to visit Mulu Caves is during the dry season from March to October, when the weather is ideal for caving, trekking, and exploring. The reduced rainfall also ensures safer and more accessible trails and cave systems.

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private chalets scatter around a tropical rainforest at Bunga Raya Island Resort Borneo
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wooden lodge perched on a small lake, with rainforest around the property - Sepilok Nature Lodge Borneo
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Hornbill in the dark tropic forest. Rhinoceros hornbill, Buceros rhinoceros, big black bird with orange bill beak in the nature habitat. Kinabatangan, Borneo

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two yellow rafts on the edge of Kiulu River in Borneo

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