Halong Bay Caves: Top 10 Must-visit Caves in Halong Bay
Ha Long Bay has long been known to many foreign tourists. Thanks to its aesthetic, geological, and geomorphological value, the bay has been recognized twice as a world natural heritage and one of the 7 natural wonders of the world. Besides Halong Bay, Lan Ha Bay located to the South, and Bai Tu Long Bay to the North are two extension parts sharing the same geological characteristic.
In September 2023, Ha Long Bay (Quang Ninh) and Cat Ba Archipelago (Hai Phong City) were recognized by UNESCO and became the very first inter-province and city World Heritage Site in Vietnam. The crystal clear water is scattered with thousands of karst towers of various sizes and natural shapes. Significantly, many of them hide a cave or grotto that amazes travelers with beautiful stalactites and stalagmites and a magical formation history. Caves are at the top of the must-visit when paying a visit to the heritage site!
What makes caves in Halong Bay a must-visit?
Exceptional landscapes
Presently, 60 caves and grottoes were discovered in Halong Bay and there are certainly many caves still hiding under those mysterious limestone islands. Each cave boasts its own beauty. Some are huge, with lots of light and rich vegetation. Some are small and mysterious. Some contain vestiges of prehistoric people and bring great archaeological value. However, all of them include miracle stalagmites and stalactites that were formed and exist over millions of years and offer mesmerizing scenery.
Unique experience
Besides aesthetic value, Halong caves offer a high value in geology and geomorphology. Whether you are a geologist or an archeologist or not, you will have a chance to learn about the interesting legends, historical stories, and the unique formation of Halong Bay and the cave.
Besides, all the caves in Halong Bay can only be accessed by waterway. Joining a cruise trip is not only a means to visit the cave but also a unique experience that you will never regret. If you have the time and budget, overnight cruises offer an all-in-one experience from transfers, dining, accommodations, modern facilities, entertainment activities, etc. Otherwise, a day trip lasting a few hours usually includes a cave visit and gives you a glimpse but no less impressive view of Halong Bay.
A perfect getaway from the city
Halong Bay is ideal for a natural getaway from the bustling city, and caves will not only feast your eyes but also provide a memorable experience. Enjoy the fresh atmosphere in the calm bay, hike and witness stunning stalactites and stalagmites uniquely shaped by Mother Nature, or kayak through the cave and enjoy the tranquility of the bay! That is perfect for you to get rid of all stress and regain peace after busy and tough days.
- Hiking
- Sightseeing
Sung Sot, also known as Surprise Cave, is the largest cave in Halong Bay, with its stunning location on Bo Hon Island. Spanning over 10,000 square meters, this majestic cave was first discovered by French explorers in 1901.
Upon entering through a modest entrance situated 25 meters above sea level, visitors are welcomed by an expansive chamber. However, the cave actually consists of three chambers, with the initial chamber being the smallest. As you proceed deeper into the cave, you'll encounter increasingly larger chambers. The smooth ceiling mimics the appearance of gentle waves, while impressive stalagmites rise from floor to ceiling, accompanied by sparkling stalactites that continue to grow. The unique, diverse shapes of these formations showcase the artistry of nature. The final chamber, often referred to as the royal garden, is the highest point in the cave and offers breathtaking vistas of Halong Bay. This sequence of awe-inspiring discoveries justifies the cave's name, Surprise Cave.
Cruises that visit Sung Sot Cave in 2025 include:
- Hiking
- Sightseeing
Thien Cung Cave, the second largest cave in Halong Bay, continues to enchant visitors with its stunning scenery, aptly referred to as the Heavenly Palace. Situated on Dau Go Island, this remarkable cave was uncovered in 1993 and opened to the public in 1998. Perched 25 meters above sea level, it is slightly smaller than Sung Sot Cave, covering nearly 10,000 square meters.
The pathway leading to the cave is rugged and embraced by lush greenery. Thien Cung Cave features a complex layout with multiple levels and chambers. Its ceilings are expansive, while the walls and floors are adorned with captivating stalactites and stalagmites. Within the cave, three chambers narrate intriguing legends about the Dragon King who brought peace to the land and the marriage of the dragon prince to a girl named May. The unique formations of the stalactites and limestone rocks inspire visitors to envision the daily life and vibrant wedding depicted in the myths.
Cruise Options:
- L’Azalee private cruise
- Day cruises
For the most enjoyable experience, it's recommended to check for the latest cruise schedules and availability as they can change. Popular cruises may include updates to features or amenities, so planning in advance is essential for a perfect visit.
For more information and bookings, you can contact local services or visit their websites. Typical resources include:
- Halong Bay Tourism Office – Phone: +84 203 3851 998
- L’Azalee Cruises – Phone: +84 914 259 579
Make sure to confirm your travel plans to enjoy the breathtaking beauty of Thien Cung Cave and the surrounding Bay in 2025/2026.
- Hiking
- Sightseeing
Located next to Thien Cung Cave on Dau Go Island, Dau Go Cave is not only captivating but also holds significant historical importance. The name "Dau Go," which translates to "wooden stake," is tied to a legendary event in Vietnamese history. General Tran Hung Dao instructed his soldiers to conceal numerous wooden stakes beneath the Bach Dang River during high tide. This created a trap when the tide receded, ultimately allowing them to defeat invading boats. The cave served as a storage site for these stakes during the conflict.
Spanning 5,000 square meters, Dau Go is one of the larger caves in Halong Bay. Unlike many hidden caves, it boasts a wide entrance that stands 12 meters high and 17 meters wide. This design allows ample sunlight and suitable moisture to foster vegetation growth. The cave consists of three chambers, interconnected by narrow paths. The naturally beautiful stalactites and stalagmites are enhanced by a mesmerizing array of colorful lights, creating a captivating atmosphere. The rich plant life adds a cool, refreshing, and tranquil environment for guests.
Cruises:
- Day cruises
- Overnight cruises
- Private charters available upon request
For cruise bookings and inquiries, visitors can contact Halong Bay Cruise Services at +84 24 3551 4730 or visit their website at www.halongbaycruises.com.
Whether seeking a day trip or an extended stay, those visiting Dau Go Cave can look forward to a remarkable blend of natural beauty and rich history in one of Vietnam's most cherished destinations.
- Hiking
- Sightseeing
Me Cung (meaning Maze or Labyrinth) is one of the most ancient and distinctive caves located in Halong Bay. It features a modest entrance and a series of narrow tunnels connecting various chambers. Positioned on Lom Bo Island, the cave resembles a natural museum, showcasing numerous remnants of prehistoric humans dating back thousands of years, providing significant natural, cultural, and historical value.
Upon entering, visitors will find themselves in a spacious chamber adorned with impressive stalactite and stalagmite formations. The cave serves as an insightful glimpse into the shelters, daily life, and cultural practices of the ancient Ha Long people. Additionally, a pathway leads to the Royal Garden, where one can observe a tranquil lagoon, as well as ascend to the mountain's summit for breathtaking views of Halong Bay, all while enjoying the refreshing ambiance.
Cruises:
- Hiking
- Sightseeing
- Kayaking
Located on Bo Hon Island, Trinh Nu Cave features three compartments connected by narrow pathways. This cave is renowned for its stunning stalactites and stalagmites, as well as the breathtaking views it offers. One of the cave's unique attractions is a small natural beach in front, where visitors can immerse themselves in the clear emerald waters.
Additionally, Trinh Nu Cave is steeped in a poignant legend about the love between a young couple. The story recounts how a girl, after rejecting a forced marriage, was exiled to a remote island, waiting in vain for her beloved. Her unwavering devotion eventually turned her to stone. Inside the cave, visitors can observe a large rock formation resembling a long-haired girl gazing toward the mainland, eternally awaiting her lover.
Cruises:
For any inquiries, including cruise bookings and additional information, you can contact +84 912 345 678 or visit the official website for updates.
6. Tien Ong Cave
- Hiking
- Sightseeing
Tien Ong Cave is remarkable for its expansive entrance and breathtaking views both from the exterior and within. Spanning approximately 1,000 square meters, the cave features two chambers divided by a prominent stone column. Notably, a massive stalactite resembling an old man with long hair and a beard has earned the cave its nickname, "fairy godfather," a beloved figure in Vietnamese folklore.
Visitors must ascend a series of stone steps to reach the entrance, which is approximately 70 meters wide. The cave has a gradual inward slope, extending about 50 meters in depth. Significant archaeological findings include thick sediment layers filled with freshwater snail shells and early stone tools, underscoring the cave's status as a valuable archaeological site in Halong Bay.
Cruise Options:
For an enhanced experience, visitors are encouraged to book their cruise in advance as Tien Ong Cave is a popular destination within the UNESCO World Heritage Site of Halong Bay. Please check with local tour operators for recent changes regarding entry fees, opening hours, and guided tours to ensure a seamless visit.
- Kayaking
- Sightseeing
Luon Cave is a unique natural wonder, renowned for its partially submerged floor, offering an unforgettable experience for kayaking and boating enthusiasts. Situated on Bo Hon Island, it lies approximately 1 kilometer from Sung Sot Cave. The cave measures about 4 meters in width, rises to 3-4 meters in height, and extends 60 meters in length.
Visitors have the choice to relax aboard a sampan boat, rowed by a local fisherman, or to paddle through the cave in a kayak. The cave opens into a tranquil lagoon, providing an ideal environment to unwind and connect with nature. Kayaking allows for a closer encounter with the rocky islands and the stunning waters of the bay. If you're fortunate, you might spot monkeys either solitary or in small groups of 3-5, gracefully navigating the cliffs and trees nearby.
Cruises to Luon Cave and the surrounding areas have also expanded, providing a variety of options for travelers. Here are some popular cruise choices as of 2025:
- Essence Grand Cruise
- Indochine Premium Cruise
- Catherine Cruise
- Paradise Elegance Cruise
- Ambassador Cruise
- Athena Luxury Cruise
- Kayaking
- Sightseeing
Located in the Cat Ba Archipelago, Sang-Toi Cave remains one of the most stunning caves in Lan Ha Bay, situated approximately 25 km south of Halong Bay. This region is home to two distinct caves. The Dark Cave (Toi Cave) stretches 100 meters in length, is relatively narrow, and receives only limited sunlight. Due to its low height, access to the cave is feasible solely by kayak during low water levels. During regular conditions, the cave is often submerged. Consequently, to ensure visitor safety, the local management authorities have prohibited all tourist activities within this cave.
In contrast, the Bright Cave is only partially submerged, allowing for easy exploration via kayak or sampan boat. Although it is shorter than the Dark Cave, Bright Cave is more spacious and benefits from greater sunlight. While traversing through the cave, visitors can marvel at the striking stalactites adorning the ceiling and experience the serene and mysterious atmosphere. Upon exiting the cave, a tranquil lagoon awaits, where there is a chance to observe monkeys, squirrels, various bird species, and more. During low tide, this area reveals breathtaking coral reefs in the pristine water, enhancing its beauty.
Cruises that visit Dark and Bright Cave:
9. Trung Trang Cave
- Hiking
- Sightseeing
Situated in Trung Trang Valley on Cat Ba Island, Trung Trang Cave is a popular stop on cruise excursions through Lan Ha Bay. This site served as a military station for the High Command during the Vietnam War, earning it the alternative name Hai Quan Cave, which translates to "Navy Cave." Remarkable remnants of its heroic past can still be found in the cave.
Spanning approximately 300 meters, the cave features a stunning array of stalactites with unique formations. Additionally, it serves as a habitat for various wildlife, including birds, bats, reptiles, and insects. To safeguard this natural ecosystem, the cave has minimal electrical lighting installed.
Cruises:
10. Thien Canh Son Cave
- Hiking
- Sightseeing
Discovered in 2010, Thien Canh Son cave quickly became a favorite among visitors to the region. Situated in Bai Tu Long Bay, the cave showcases a stunning atmosphere of tranquility and natural splendor. While the entrance is relatively small, what lies beyond is an impressive spectacle that will surely take your breath away.
Like many caves, Thien Canh Son is adorned with limestone formations that are thousands of years old. Guests can marvel at natural sculptures resembling elephants, seals, lotus flowers, and hanging lamps, all intricately carved into the stalactites and stalagmites by nature itself. The view from the cave's peak offers a majestic panorama of Bai Tu Long Bay, undoubtedly a mesmerizing highlight of any visit.
Cruises:
- Signature Cruise
- Signature Royal Cruise
- Dragon Legend Cruise
- Renea Cruise
- Paloma Cruise
- Swan Cruise
- L’Amour Junk
- Halong Organic Cruise
- Era Cruise
If you are planning a visit, make sure to check the latest schedules and book in advance, as these tours tend to fill up quickly during peak tourist seasons.
Best time to visit
Featuring a typical tropical climate of the Northern region, Halong Bay has 4 seasons: Spring, Summer, Autumn, and Winter. In general, the weather in Halong is pleasant all year round to pay a visit as each season offers different beautiful scenery. However, the most ideal time to visit the caves is from March to April and October to November.
March to April is Spring with the temperature ranging from 18 - 24°C, the lowest rainfall in the year, and light sunshine. October to November is Autumn with cool temperatures from 23 to 27°C, not as hot as summer and cold as winter. These periods of time are perfect for outdoor activities such as walking and hiking in the cave.
See our guide on the best time to visit Halong bay
Travel tips to have the best cave trip
- Summer from June to September has lots of sunshine and blue sky which is perfect for sightseeing in Halong. However, there is a higher chance of heavy rains and storms and sometimes it is not very preferable for a cave visit. You can choose June or September which is not yet affected much by rains and storms. The other months are also possible but you should check the weather forecast carefully to book the trip.
- Summer is the high season for the domestic market. If you want to avoid crowds, you can choose from September to May next year.
- Some caves may have flat stone steps and ground that are easy to walk on, while some may have rough and slippery steps. Therefore, preparing a suitable pair of shoes is essential. Hiking shoes are recommended.
- Caves can be very big or small. The paths from one chamber to another can be large or narrow. Some require a climb of around 100 - 200 steps to reach the entrance. If you have any health problems, you should inform the staff to have more details in the instructions.
- Some other belongings you may need are insect repellent, a hat, sunglasses, long-sleeve shirts, or a light jacket (the temperature in the cave is a bit lower than the outside).
- While kayaking at underwater caves such as Luon or Sang-Toi Cave, swimwear/shorts are suggested. Phone/camera is not recommended but if you really want to bring them, covering them in a dry bag is necessary.
