Discovering the Mulu Caves
Follow elevated walkways and jungle trails to explore towering limestone caverns, underground rivers and glittering cave chambers before witnessing millions of bats stream into the dusk sky in mesmerising formations.
Gunung Mulu National Park is a UNESCO World Heritage site with some of the world’s most extensive and dramatic cave systems. From enormous caverns and twisting river tunnels to delicate stalactite formations and rainforest-shaded pools, it’s a subterranean world of extremes – both vast and intricate, dramatic yet deeply peaceful.
Exploring Mulu’s caves feels like entering another planet. Deer Cave, the world’s largest cave passage, is big enough to fit London’s St Paul’s Cathedral under its vast arch. A 3km raised plankway through lush rainforest leads to both Deer and neighbouring Lang’s Cave, where some of the park’s finest stalactites and stalagmites hang like icy chandeliers in the humid air.
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Give us a call 9am-5pm UK time Monday to Friday, or make an enquiry online at any time.
What to expect when discovering Mulu’s caves:
- Walk elevated plank paths through dense rainforest to reach Lang’s and Deer Caves.
- Witness the world’s largest cave passage and a nightly bat exodus of staggering scale.
- Take a longboat ride up the Melinau River to Wind Cave and Clearwater Cave.
- Swim in the turquoise pool at Clearwater’s entrance and enjoy a shaded riverside picnic.
- Spot orchids and rainforest plants unique to this limestone ecosystem.
- Challenge yourself with a trek to the Pinnacles – dramatic limestone spires crowning Mount Api.
A ribbon of bats
“Stick around until sunset and you'll witness one of Borneo’s most extraordinary wildlife events: over three million bats spiralling out of Deer Cave in a pulsing black ribbon across the twilight.”
Deer & Lang's Caves
A 3km forest plankway leads you to Deer Cave – the largest cave entrance in the world. As you step inside, the cathedral-sized void opens up before you, and the light shifts dramatically. Lang’s Cave, next door, showcases some of the most intricate limestone formations in the park. And your day ends on a crescendo as the wings of three million bats flap all around you.
Clearwater & Wind Caves
Board a longboat for a journey up the Melinau River to the Wind Cave and Clearwater system. Here, an underground river carves a network of passages beneath towering karst cliffs. Clearwater Cave stretches over 200km – one of the longest in the world – and features a spring-fed pool that’s perfect for a cooling swim after your subterranean adventures.
The Trek to the Pinnacles
For the bold, the Pinnacles trek is a must. Towering 45-metre-high limestone spikes rise like jagged blades from the forest slopes of Mount Api. This tough climb requires stamina and good fitness but rewards you with unbeatable views and bragging rights. Routes and durations can be tailored to suit your ability and enthusiasm.
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Give us a call 9am-5pm UK time Monday to Friday, or make an enquiry online at any time.
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