Adventures for the Not-So-Adventurous: Phenomenal Show Caves of Mulu

Adventures for the Not-So-Adventurous: Phenomenal Show Caves of Mulu

So, you aren’t the adventurous climb-and-wade-in-the-inky-darkness type of traveller. That doesn’t mean you can’t visit the UNESCO World Heritage-listed Gunung Mulu National Park in the East Malaysian state of Sarawak, which ranks among the most cavernous limestone hills in the world.

Images: Ariff Shah Sopian

Light streams through a doline, or karst sinkhole, in Clearwater Cave

The caves of Mulu are among the natural wonders of Borneo, which include Mt Kinabalu and the amazing wildlife of the island. Aside from adventure caving, visiting the otherworldly show caves is a popular activity in Mulu. You only need to be able to walk on planks and go up and down paved steps or steel stairs – simple enough for kids and moderately fit seniors. That means you have no excuse not to visit.

Crossing a hanging bridge on the way to the Park Office

Tours are guided, so there’s no way to get lost in the humid rainforest. For the show caves, a 3D2N stay is recommended, but 2D1N is also feasible if the weather is good. Here’s a primer if you want to know what’s in store for you in these caves.


These two caves are close to each other on the Gunung Api section of the Melinau Limestone, estimated to be 17 to 40 million years old. You won’t notice it, but by the end of the morning, you’d have climbed up and down the equivalent of a 40-storey building.

Longboat Ride

What’s so special about it? You can head back to the airport (ok, 100m from the entrance) by longboat after visiting the caves

Hop on a longboat for a short river cruise to the mouths of caves perched high up in the hills. Longboats leave Park HQ at 8.45am for the short trip upstream. A stop in the village of Batu Bungan gives you a chance to shop for souvenirs at the small market to support the indigenous Penan people, a previously nomadic tribe that has settled there.

A longboat on the Melinau River seats up to six passengers and two boatmen

Wind Cave

What’s so special about it? The cooling wind that blows through the cave

The breezy cave is remarkable for its columns, which form when stalactites (cave formations hanging from the ceiling) meet stalagmites (formations rising from the ground). Wind Cave is noted for King’s Chamber, which has several of these ancient pillars.

The distinctive columns of Wind Cave

Clearwater Cave

What’s so special about it? A river runs through it
A subterranean river flows through the cave, giving you a glimpse of how the cave came to be. Over 200km of the cave has been recorded and parts of it are yet to be explored. After a picnic lunch at the rest area, you can go for a swim in the nearby sandy pool’s clear waters, which will supposedly restore your youth. (Worth a try, no?) For intermediate and advanced cavers, Clearwater Cave also offers adventure caving opportunities that include dry and wet caves.

A steel bridge over the underground river at Clearwater Cave


These two very different caves are almost next to each other in the Southern Hills section of the park. Guides lead daily tours that leave the Park Office at 2.00pm and 2.30pm. A plank walk nearly 4km long leads to a rest area where you’ll begin your exploration of the caves. 

Lang Cave

What’s so special about it? Beautiful cave formations

The smallest of the show caves in Mulu, Lang Cave is famous for its stalactites and stalagmites that look like fountains frozen in time. You can also observe the dripping of mineral-rich water, hardening over thousands of years to create formations that continue to grow in size today.

Lang Cave formations appear to flow from the ceiling

Deer Cave

What’s so special about it? It’s HUUUUGE

There are no deer inside anymore, but they used to take shelter and lick the salt columns here. One of the world’s largest cave passages, Deer Cave measures 169m wide and 125m tall at its largest cross-section. Impressive boulders and a dried-up riverbed are among the memorable features of the cave, alongside the strong odour of guano (bat droppings) that permeates the air because of the bats living here.

The scale of Deer Cave is challenging to photograph

Bat Exodus

What’s so special about it? The sight of over a million bats heading out of Deer Cave in search of food

After visiting the caves, wait at the rest area for the winged cave residents to fly out in swirling ribbons. This begins between 5pm and 6pm and takes up to two hours. However, the bats do not feed every day. Keep your fingers crossed that you’ll catch this phenomenon!

Sometimes like a tornado, sometimes like a double helix – the Bat Exodus from Deer Cave


  • Walking shoes with non-slip soles, as surfaces may be slippery
  • Torch, head light, or phone flashlight to help you see details of the caves
  • Plastic poncho in case of rain (umbrellas will not be useful in the downpour)
  • Drinking water and snacks, as food and drinks at the park are more expensive than usual
Sunlight enters Deer Cave in the evening

GETTING THERE Mulu is accessible by daily domestic flights from Miri. AirAsia flies to Miri from Kuala Lumpur, Kota Kinabalu, Kuching and Singapore. Get your seats now at

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