The cave opening that everyone watches.
1 / 10

Deer Cave Mulu

4.7
Β·217 reviewsΒ·Miri, Malaysia

Explore one of the world's largest cave passages and witness millions of bats emerge at dusk in a breathtaking natural spectacle.

Highlights

Highlights

Must-see attractions

Social content

Social

From TikTok & Reddit

Best Time

Evenings, around sunset

To witness the bat exodus

CrowdHigh
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The cave opening that everyone watches.

Deer Cave Mulu

Best Time

Evenings, around sunset

To witness the bat exodus

CrowdHigh
Highlights

Highlights

Must-see attractions

Explore one of the world's largest cave passages and witness millions of bats emerge at dusk in a breathtaking natural spectacle. Instagram+1

4.7
(217 reviews)

"Millions of bats emerge from Deer Cave in a mesmerizing spectacle against the twilight sky. Instagram"

Vertical photo
TIP

🎯 Arrive Early for Bat Exodus

Secure a prime viewing spot at the bat observatory at least 30-60 minutes before sunset.

πŸ‘Ÿ Comfortable Walking Shoes

The boardwalks can be slippery; wear sturdy shoes for exploring the cave.

Third hero image

Quick Facts

Rating

4.7 Β· 218 reviews

Type

Tourist Attraction

πŸ‘Ά Good for kids

Highlights

Discover the most iconic attractions and experiences

The Bat Exodus

The Bat Exodus

Outside Deer Cave entrance

Witness millions of bats emerge at dusk in a breathtaking, swirling spectacle against the twilight sky.

Instagram+1
Immense Cave Passages

Immense Cave Passages

Inside Deer Cave

Explore one of the world's largest cave passages, so vast it could house a small city.

InstagramReddit
Garden of Eden

Garden of Eden

Rear zone of Deer Cave

Discover a unique forested area with ferns growing within a collapsed section of the cave.

Reddit
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Planning Your Visit

Timing is Everything for the Bat Exodus

The star attraction at Deer Cave is the nightly bat exodus. Arrive at the viewing platform well before sunset to secure a good spot. The spectacle can last 30-45 minutes, so be prepared to wait and enjoy the anticipation. Instagram+1

Prepare for the Cave Environment

Deer Cave is immense, and while boardwalks make it accessible, expect some uneven terrain. The air can be humid, and the smell of bat guano is noticeable due to the millions of bats residing there. Reddit Wear comfortable shoes and consider a light rain jacket. Instagram

Best Times

When
Evenings, around sunset
Why
To witness the bat exodus
Crowd
High
When
Daytime, before exodus
Why
Explore cave interior
Crowd
Medium

Insider Tips

from TikTok, Instagram & Reddit

THESE ARE BATS!! πŸ¦‡ Deer Cave, Gunung Mulu National Park, Malaysia πŸ“
happy.han_
1.1K likes β€’ 13.9K views

🎯 Arrive Early for Bat Exodus

Secure a prime viewing spot at the bat observatory at least 30-60 minutes before sunset. InstagramReddit

πŸ‘Ÿ Comfortable Walking Shoes

The boardwalks can be slippery; wear sturdy shoes for exploring the cave. Instagram

Deer Cave, Mulu β€” where shadows breathe and nature speaks. For exclusive packages, hit the link in our bio! #beaborneotravel #sarawaktourism #travel #mulusarawak #tourismmalaysia #visitmalaysia2026
beaborneotravel
19 likes β€’ 525 views
My trip to Mulu National Park was nothing short of spectacular as I witnessed the breathtaking bat exodus. The anticipation built as millions of bats (2.5 to 3.5 mil) emerged from Deer Cave, creating a mesmerizing spectacle against the twilight sky. The rhythmic flapping of wings and the sheer magnitude of the exodus left me in awe of nature’s wonders. #mulunationalpark #malaysia #bat #bats #b...
ddaavviiidddd
52 likes β€’ 823 views

πŸ‘ƒ Be Prepared for Odor

The smell of bat guano is strong due to millions of bats. Reddit It's part of the natural experience.

πŸ“Έ Camera Ready for Dusk

Capture the magical bat exodus, but be mindful of low light conditions. Instagram

Welcome to deer cave at Gunung Mulu National Park
elli_mosi
18 likes β€’ 227 views

Tips

from all over the internet

🎯 Arrive Early for Bat Exodus

Secure a prime viewing spot at the bat observatory at least 30-60 minutes before sunset. InstagramReddit

πŸ‘Ÿ Comfortable Walking Shoes

The boardwalks can be slippery; wear sturdy shoes for exploring the cave. Instagram

πŸ‘ƒ Be Prepared for Odor

The smell of bat guano is strong due to millions of bats. Reddit It's part of the natural experience.

πŸ“Έ Camera Ready for Dusk

Capture the magical bat exodus, but be mindful of low light conditions. Instagram

πŸ’§ Light Rain Jacket

Weather can change quickly; a light jacket is useful for comfort. Reddit

What Travellers Say

4.7
(217 reviews)

Reviews Summary

Visitors are consistently awestruck by the immense scale of Deer Cave and the unforgettable spectacle of the nightly bat exodus. The cave's natural formations and the unique Garden of Eden are frequently praised. However, the strong smell of bat guano and the crowds during the exodus can be drawbacks for some.

"I visited my 4th cave that day and it is the Deer Cave. The entrance was magnificnet and the interior cavern was even more so. It was so huge that you can build a small city inside the caverns. The guide took our group along the boardwalk and as we went deeper, the natural light from the entrance started to fade. There were a lot of rock formations and we started to see some bats roosting. It was not as damp as the earlier caves and the air was cool. As per the earlier caves, we looped back after a long walk exploring the interior, eager to witness the bat exodus outside later in the evening. Thousands and maybe millions of bats will fly out each evening in search of food and it is a sight to behold indeed. After exiting the amazing cave, we settled on the viewing platform right outside to take a break and await the daily evening spectacle."

gevs

"The last point of the trip was observing bats flying out of the cave in the evening. We were lucky because the weather was beautiful, it wasn't raining and we could observe an amazing show - the bats flew out in groups of about 100,000 bats and at the same time tried to avoid the birds of prey that were hunting them. It is worth coming a bit earlier and taking a good place to see everything well. On the way back we were caught in heavy rain, which shows how lucky we were to witness such a show."

Robert ObΕ‚Γ³j

"A cave with a huge interior that is home to millions of bats, so a lot of bat droppings on the cave floor. In the past years many deer visited the cave for the salt and nutrients in the water run off from the bat droppings, hence the name Deer Cave. Seeing the bats fly out at dusk is an amazing sight!"

Vincent Oliver

What People Like

Immense cave size
Spectacular bat exodus
Unique rock formations

What People Dislike

Strong guano smell
Crowded viewing areas

Frequently Asked Questions

πŸš‡ πŸ—ΊοΈ Getting There

Deer Cave is located within Gunung Mulu National Park. Access to the park is typically by flight to Mulu Airport (MZV) from Miri, Kuching, or Kota Kinabalu. Reddit From the park entrance, it's about a 3.8km walk along a boardwalk to reach Deer Cave and Lang Cave. Reddit

The primary mode of transport to Mulu National Park is by air. There are no direct public bus services to the park. Flights are the most common and practical way to reach Mulu. Reddit

The walk from the Mulu National Park entrance to Deer Cave and Lang Cave is approximately 3.8 kilometers (about 2.4 miles) along well-maintained boardwalks. Reddit

No, taxis and ride-sharing services like Grab are not available in Mulu National Park due to its remote location. Transportation within the park is mainly by foot or park-provided shuttles for specific activities. Reddit

Yes, many tour operators offer packages that include flights to Mulu, accommodation, and guided tours to the caves, including Deer Cave. InstagramReddit

🎫 🎫 Tickets & Entry

Yes, you need to purchase an entrance ticket for Gunung Mulu National Park, which covers access to the show caves like Deer Cave and Lang Cave. Tickets can be bought at the park headquarters. Reddit

Deer Cave is open during daylight hours for exploration. The main attraction, the bat exodus, occurs at dusk. Check with park rangers for the exact timing of the exodus, which varies seasonally. Instagram

Entrance fees are for Gunung Mulu National Park. Specific prices for cave tours can vary, and it's best to check the official Sarawak Forestry Corporation website or inquire at the park headquarters for the most current rates. Reddit

For the show caves like Deer Cave, a guided tour is typically mandatory. Guides are essential for safety and to provide information about the cave's geology and wildlife. Reddit

It's advisable to book your park entrance tickets and any desired cave tours in advance, especially during peak tourist seasons, to ensure availability. Reddit

🎫 🧭 Onsite Experience

The bat exodus typically occurs around sunset, lasting for about 30-45 minutes. Arrive at the viewing platform early to get a good spot. Instagram+1

Wear comfortable, sturdy walking shoes as the boardwalks can be slippery. A light rain jacket is also recommended as the weather can be unpredictable. InstagramReddit

Yes, Deer Cave is generally suitable for children. The boardwalks make it accessible, but parents should supervise young children closely. The bat exodus can be a fascinating experience for kids. Instagram

The Garden of Eden is a unique section within Deer Cave where a collapsed part of the cave ceiling allows sunlight to penetrate, supporting a lush growth of ferns and vegetation. Reddit

The guided tour through Deer Cave, including the walk to and from the entrance, typically takes about 1.5 to 2 hours. This allows time to explore the interior and wait for the bat exodus. Reddit

πŸ“Έ πŸ“Έ Photography

Photography is generally allowed inside Deer Cave, but flash photography is often prohibited to avoid disturbing the bats and other cave inhabitants. Always check with your guide. Instagram

For the bat exodus, use a tripod if possible and a camera with good low-light performance. Experiment with higher ISO settings and slower shutter speeds to capture the movement. Instagram+1

You might see bats roosting inside the cave, but they are often high up and difficult to photograph clearly without a powerful zoom lens. The main photographic opportunity is the exodus at dusk. Instagram

A camera with good low-light capabilities and a wide-angle lens is ideal for capturing the vastness of the caves. A telephoto lens can be useful for spotting wildlife. Instagram

Drone usage is typically restricted in national parks to protect wildlife and for safety reasons. It's best to check with Mulu National Park authorities for their specific drone policy. Instagram

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