Halong Bay is famous for its thousands of limestone islands and islets, and many of them hide spectacular caves. The best caves in Halong Bay are Sung Sot (Surprise Cave), Thien Cung (Heavenly Palace) and Dau Go, which you can visit on a day cruise, plus Luon Cave, where you paddle by bamboo boat or kayak into a hidden lagoon. Here are 10 amazing caves in Halong Bay that Indian travellers who love nature and adventure should not miss at this UNESCO World Heritage Site in Vietnam.
Halong Bay caves at a glance (updated November 2026)
- Best Halong Bay caves: Sung Sot (largest, about 10,000 m²), Thien Cung (colourful stalactites), Dau Go (history) and Luon (by boat or kayak).
- Routes: Thien Cung and Dau Go are on route 1; Sung Sot, Luon, Bo Nau, Trinh Nu and Me Cung are on route 2; Tien Ong is on route 3; Thien Canh Son is on route 4.
- Sightseeing fee: about 260,000–310,000 VND (≈ ₹950–1,135) per adult for a day route, usually included in cruise prices; you must show your passport when buying a ticket.
- Cruise prices: roughly US$65–120 (≈ ₹6,175–11,400) for a day cruise and US$110–300 (≈ ₹10,450–28,500) per person for 2 days/1 night.
- Best time: March to May and September to November; typhoon risk is highest from July to September.
Halong Bay Caves at a Glance
The table compares the 10 best Halong Bay caves by island, sightseeing route and main highlight.
| Cave | Island / area | Route | Highlight |
|---|---|---|---|
| Sung Sot Cave | Bo Hon Island | Route 2 | Largest cave, two huge chambers |
| Thien Cung Cave | Dau Go Island | Route 1 | Colourful stalactites, legends |
| Dau Go Cave | Dau Go Island | Route 1 | History of the 1288 Bach Dang battle |
| Bo Nau Cave | Bo Nau Island | Route 2 | Panoramic view of the bay |
| Luon Cave | Bo Hon Island | Route 2 | Bamboo boat or kayak into a lagoon |
| Me Cung Cave | Lom Bo Island | Route 2 | Prehistoric remains |
| Trinh Nu Cave | Bo Hon Island | Route 2 | Love legend, rock shapes |
| Tien Ong Cave | Cua Van area | Route 3 | Archaeology, 8,000–10,000 years old |
| Dark & Bright Cave | Lan Ha Bay (Cat Ba) | Lan Ha cruises | Kayaking through a sea tunnel |
| Thien Canh Son Cave | Hon Co Island, Cong Do area | Route 4 | Quiet, less-visited cave |
Which Is the Best Cave in Halong Bay?
Sung Sot (Surprise Cave) is usually considered the best and biggest cave in Halong Bay, while Thien Cung is the most colourful; if you have time for only one route, route 2 combines Sung Sot, Ti Top Island and Luon Cave.
Most day cruises from Ha Long visit one or two caves, while overnight cruises add kayaking at Luon Cave or in Lan Ha Bay. Choose your cruise based on which caves are on its route. The caves below are listed with their location and the best way to visit.
1. Sung Sot Cave
The vast main chamber of Sung Sot (Surprise) Cave.
Sung Sot Cave is the most impressive and biggest cave in Halong Bay, covering about 10,000 m². French explorers named it “Grotte des Surprises” in 1901 because of its huge size and spectacular formations. The entrance is about 25 m above sea level, reached by a stone staircase.
The cave has two main chambers. The first is like a theatre hall, with a high ceiling and plenty of light. The second is larger and more mysterious, with stalactites and stalagmites shaped like animals, plants and human figures, and a small pond and garden inside.
- Location: Bo Hon Island, central Ha Long Bay, Quang Ninh
- Size: about 10,000 m²
- Route: route 2 (with Ti Top Island and Luon Cave)
2. Thien Cung Cave
Colourful lighting on the formations of Thien Cung Cave.
Thien Cung Cave, or “Heavenly Palace Cave”, was discovered by fishermen sheltering from a storm in 1993 and opened to visitors in 1998. Its chambers are decorated with stalactites and stalagmites that local guides link to legends, including a royal wedding scene. The central area has four large columns and pools that reflect the lights.
Listen for the soft sounds of wind and water inside as you walk along the lit path.
- Location: Dau Go Island, about 4 km from the main cruise port
- Size: about 3,000 m²
- Route: route 1 (with Dau Go Cave)
3. Dau Go Cave
Rock formations inside Dau Go Cave.
Dau Go Cave is one of the most historic caves in Halong Bay. Its name means “hidden wood”: according to legend, General Tran Hung Dao stored wooden stakes here before the 1288 Bach Dang River battle against the Mongol fleet. The French called it “Grotte des Merveilles” (Cave of Wonders).
The cave has three main chambers, with stalactites and stalagmites of many colours and sizes and a natural well in the last chamber. It is a favourite of photographers.
- Location: Dau Go Island, about 300 m from Thien Cung Cave
- Size: about 5,000 m²; entrance 27 m above sea level
- Route: route 1
4. Bo Nau Cave
Halong Bay framed by the entrance of Bo Nau Cave.
Bo Nau Cave is small but one of the most charming caves in Halong Bay. Its wide entrance, hung with stalactites, looks like the mouth of a giant beast. The best thing about Bo Nau is the view: limestone mountains, emerald water and blue sky framed by the cave entrance, like a natural picture of halong bay.
- Location: Bo Nau Island, about 13 km from Tuan Chau
- Size: about 1,000 m²
- Route: route 2
5. Luon Cave
Bamboo boats passing under the arch of Luon Cave.
Luon Cave is a water tunnel through a limestone island that can only be reached by bamboo boat or kayak. If you want a fun, adventurous experience in Halong Bay, don’t miss it.
You pass under a low arch of stalactites and come out into a calm lagoon surrounded by high cliffs, where you may see monkeys and birds. Bamboo boats are rowed by locals, so it is suitable for families and non-swimmers too.
- Location: Bo Hon Island, near Sung Sot Cave
- Route: route 2
6. Me Cung Cave
Me Cung, the “Labyrinth Cave”, holds traces of prehistoric life.
Me Cung Cave (“Labyrinth Cave”) contains archaeological evidence of human life from about 7,000 to 10,000 years ago, linked to the Soi Nhu and early Ha Long cultures. The most notable finds at the entrance are Melania snail shells, a freshwater species eaten by prehistoric people. Inside, a network of chambers and passages resembles a maze, and from the exit you can see a lake surrounded by mountains.
- Location: Lom Bo Island, about 2 km southwest of Ti Top Island
- Route: route 2
7. Trinh Nu Cave
Natural light inside Trinh Nu (Virgin) Cave.
Trinh Nu Cave (“Virgin Cave”) is known for the legend of a beautiful girl who died in the cave waiting for her fisherman lover and turned to stone; a rock inside is said to show her figure. The cave has three chambers decorated with stalactites and stalagmites, and sunlight filtering in through openings creates a magical atmosphere.
- Location: Bo Hon Island, near Sung Sot Cave
- Size: chambers about 15 m high and 25 m wide
- Route: route 2
8. Tien Ong Cave
Tien Ong Cave is both a natural wonder and an archaeological site, with traces of people who lived here about 8,000–10,000 years ago, in the Soi Nhu culture. It was first studied by Swedish archaeologist J.G. Andersson in the late 1930s and excavated again in 2007, and an on-site display explains the finds.
Inside, the stalactites and stalagmites take many shapes, including one said to look like an old fairy man (Tien Ong), and the cave is lit with soft colours.
- Location: Cai Tai Islet, south of Ha Long Bay, on the same route as Cua Van fishing village
- Length: about 156 m
- Route: route 3 (with Cua Van and Ba Ham Lake)
9. Dark & Bright Cave
Kayaking through the tunnel of the Dark & Bright Cave.
Dark & Bright Cave (Hang Sang Toi) is a sea tunnel that you explore by kayak or bamboo boat, passing from the dark section into a bright lagoon surrounded by limestone cliffs and green jungle. It lies in lan ha bay, part of the Cat Ba archipelago, which joined Ha Long Bay in the UNESCO site “Ha Long Bay – Cat Ba Archipelago” in 2023. Lan Ha is quieter and less crowded than central Ha Long Bay.
- Location: northeast Lan Ha Bay, Cat Hai special zone, Hai Phong City
- How to visit: on Lan Ha Bay day trips and overnight cruises from Ha Long or Cat Ba
10. Thien Canh Son Cave
A quiet chamber in Thien Canh Son Cave.
Thien Canh Son Cave is one of the less-visited caves in Halong Bay, so it feels peaceful. Its ceiling glitters with crystal formations that catch the light, and the walk inside is short and easy. It lies in the Cong Do area of Ha Long Bay, close to bai tu long bay, so it is often included on quieter cruise routes.
- Location: Hon Co Island, Cong Do area, Ha Long Bay
- Size: a small cave, under 50 m long
- Route: route 4 (with Cong Do and Vung Vieng fishing village)
Halong Bay Cave Routes and Ticket Prices 2026
Halong Bay caves are visited on official sightseeing routes, and the fee depends on the route rather than on each cave.
| Route | Main caves and stops | Day fee per adult |
|---|---|---|
| Route 1 | Thien Cung, Dau Go, Fighting Cocks Islet, Incense Burner Islet | 310,000 VND (≈ ₹1,135) |
| Route 2 | Sung Sot, Luon, Bo Nau, Trinh Nu, Me Cung, Ti Top Island | 310,000 VND (≈ ₹1,135) |
| Route 3 | Tien Ong, Cua Van, Ba Ham Lake | 260,000 VND (≈ ₹950) |
| Route 4 | Thien Canh Son (Hang Co), Cong Do, Vung Vieng | 260,000 VND (≈ ₹950) |
Children aged 7–15 receive a discount, and children under 7 shorter than 1.2 m enter free. Fees are usually included in cruise prices; check with your cruise operator.
Best Time to Visit Caves in Halong Bay
The best time to visit caves in Halong Bay is from March to May and from September to November, when the weather is pleasant and the sea is usually calm. December to February is cool and often misty, which can reduce views. June to October is the typhoon season, with the highest risk from July to September, when cruises may be cancelled at short notice.
After a tour boat capsized in a sudden storm in July 2025, Quang Ninh introduced 24/7 vessel monitoring and rescue patrols, and cruises are suspended whenever storm warnings are issued. Always follow the crew’s safety instructions and wear a life jacket on small boats and kayaks.
Tips For Visiting Caves In Halong Bay
- Book a cruise whose route includes the caves you want to see; route 2 is best for Sung Sot and Luon, and route 1 for Thien Cung and Dau Go.
- Wear comfortable shoes with good grip; cave paths can be wet and some, like Sung Sot, have many steps.
- Carry your passport, as it is required when buying Ha Long Bay tickets since December 2025.
- Respect the environment: don’t touch or break formations, and don’t litter.
- Ask your cruise in advance for vegetarian or Jain meals; most cruises can arrange them.
- For hassle-free planning, choose trusted travel agents for vietnam such as Vietnamtour.in.
Want help choosing the right Halong Bay cruise and cave route? Share your travel details and our team will plan it for you.
FAQs About Caves in Halong Bay
Which is the biggest cave in Halong Bay?
Sung Sot (Surprise) Cave on Bo Hon Island is the biggest cave in Halong Bay, covering about 10,000 m².
How many caves can you visit on a Halong Bay day cruise?
Most day cruises visit one or two caves, such as Sung Sot and Luon on route 2, or Thien Cung and Dau Go on route 1.
How much does it cost to visit Halong Bay caves?
The sightseeing fee is about 260,000–310,000 VND (≈ ₹950–1,135) per adult per route, and it is usually included in cruise prices.
Are Halong Bay caves suitable for elderly travellers?
Thien Cung and Dau Go have lit paths and fewer steps; Sung Sot has a long staircase, so elderly travellers should take it slowly.
Can you kayak in Halong Bay caves?
Yes. You can kayak or take a bamboo boat through Luon Cave in Ha Long Bay and the Dark & Bright Cave in Lan Ha Bay.
Routes, ticket prices and cruise details in this guide were last checked in November 2026 and may change.
Conclusion
The caves in Halong Bay will surprise you with their beauty and mystery. Discover more things to do in halong bay, explore other vietnam caves such as Phong Nha, or choose one of our best vietnam tour packages with a Halong Bay cruise for an unforgettable trip.
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