Surprise Caves Overview

The Surprise Cave locally known as Sung Sot Cave is the most popular attraction in Halong Bay. Spread across a vast area of 12,000 square metres, it is the largest cave in Halong Bay. The length of this cave is about 800 metres whereas the height is about 30 metres. 

In contrast to the narrow entrance, this is an enormous cave that can include up to a thousand people at once. Inside the cave, you will get to see impressive stalagmites and stalactites. The beauty of the cave has been enhanced by the colourful lightings which add a dramatic touch to the cave. 

Additionally, this Cave holds a major cultural significance for the localities. As you go further inside the cave, you will get to hear about the ‘Legend of Thanh Giong’. As per native mythology, it is believed that thousands of years ago, Thanh Giong protected the locals from demons and evils. While exploring the cave, you will get to witness a horse-shaped rock and a sword-shaped stalagmite which is believed to belong to ‘The Protector’.


• Explore the largest cave of Halong Bay, the Surprise Cave, adorned with stunning stalagmites and stalactites. 
• Cruise along the deep blue waters of Halong Bay and admire the picturesque views throughout the journey.
• Learn about the ‘Legend of Thanh Giong’ which is an intriguing native mythology. 
• Enjoy a swim in the clear waters of the Halong Bay for a refreshing experience.
• Visit nearby attractions- Trinh Nu Cave, Turtle Island, Luon Cave and Tien Cave.

How To Reach

By Water: The only way to reach Surprise Cave is by water. You can take a cruise from the Bai Chay Wharf which is located around 2 km from the city centre of Halong. You can reach here in approximately 10 minutes via the Hải Quân route. From Bai Chay, you can take cruise ship no.2 which will take you directly to the Surprise Cave. You can also choose to take a private boat which is also available at the wharf. You will reach your destination in approximately 20 minutes, covering a distance of around 14 km. 

Best Time To Visit

Best Season: Visit the Surprise Cave between the months of February-June and September-October to experience pleasant weather. 

Best Day of the Week: You can plan your visit to the Surprise Cave during weekdays to avoid crowds.

Best Time of the Day: If you wish to avoid crowds and explore the place peacefully then you can visit the Surprise Cave during early hours. 

Other Essential Information

  • To secure your seat on the cruise, remember to book your slot in advance. 
  • Make sure to wear light clothes and sturdy shoes for a comfortable trip.
  • Carry sufficient water and snacks to keep yourself recharged throughout the trip.
  • Avoid running on the wooden walkways inside the cave as it gets slightly slippery at times. 
  • Remember to wear life jackets at all times while on a boat or cruise to ensure your safety.
  • Avoid littering inside or near the cave to maintain the natural beauty of the location.
  • Carry a hat and apply sunscreen generously if you are planning your trip on a sunny day.
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Day Wise Timings
Open Today
Normal Timings:
08:00 AM to 06:00 PM
Normal Timings:
08:00 AM to 06:00 PM
Normal Timings:
08:00 AM to 06:00 PM
Normal Timings:
08:00 AM to 06:00 PM
Normal Timings:
08:00 AM to 06:00 PM
Normal Timings:
08:00 AM to 06:00 PM
Normal Timings:
08:00 AM to 06:00 PM
Point of Interest for Surprise Caves
Soak in the serene views

Soak in the serene views

Surprise Cave is located on the popular Bo Hon Island which is renowned for its untouched natural beauty. As you get closer to the cave, you will be welcomed by the towering mountains, lush greenery, open blue sea and sound of the waves. The picturesque and soothing surroundings of the cave make it an ideal getaway destination. The awe-inspiring beauty of this island attracts approximately 2 million tourists every year from all over the world.

Enjoy cruising

Enjoy cruising

To reach the Surprise Cave, you will need to take a boat or a cruise from the Bai Chay Wharf. It is a fun experience that allows you to explore the deep blue waters of Halong Bay. Admire the gorgeous views and feel the sea breezes while enjoying the cruise ride. You can also take a boat from the Bai Chay Wharf to reach the cave. Boating allows you to interact with other tourists as well as witness underwater marine life.

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