Trung Trang Cave Cat Ba: The Complete 2026 Travel Guide

Trung Trang Cave is open again and receiving visitors as normal.

Last updated: 14 September 2026

Trung Trang Cave is an ancient underground cave and one of the largest and most well known caves in the Cat Ba archipelago. It is a major draw for visitors, welcoming tens of thousands of local and international travelers every year. Read on for everything you need to know about Trung Trang Cave before you visit.

Where is Trung Trang Cave and how far is it

The cave sits about 12 km from the Cat Ba tourist center, and about 1 km south of the Cat Ba National Park headquarters, right beside the road that leads into Cat Ba town. From the park headquarters, it is only about a 10 minute walk. You will see other numbers online, some say 15 km from town, which likely comes from measuring a different starting point. If you are planning your visit around the national park, the distance from the park headquarters is the one to trust.

How to get to Trung Trang Cave

Most visitors rent a motorbike in Cat Ba town and ride there themselves, since the road is flat and easy to follow the whole way. If you would rather not drive, a taxi from town costs about 350,000 to 400,000 VND one way and takes around 30 minutes.

There is a small parking area at the cave. Parking costs 5,000 VND for a motorbike and 10,000 VND for a car, so keep a little small cash on hand.

What it costs and when to visit

Entry to Trung Trang Cave is included in the Cat Ba National Park ticket, which costs about 80,000 VND per adult. The cave is normally open daily from 8:00 in the morning to 5:00 in the afternoon, and most visitors spend between 30 minutes and an hour walking through, depending on how many stops they make to look at the formations.

The legend of Lady Trung Trang

Stepping through the entrance, visitors are struck not only by the beauty of the cave and the strange, wonderful way nature has shaped it, but also by a legend tied to both the cave and the island of Cat Ba itself.

The story goes that Cat Ba was once a beautiful archipelago and a strategically important stronghold, which is why foreign invaders tried to seize it again and again. To defend the homeland and protect the people of the island, a lady known as Lady Trung Trang called on the young men of the island to take to the sea and drive the enemy away. After she had helped the islanders defeat their enemies, Lady Trung Trang came to settle in this very cave, where she meditated and continued to watch over and protect the island so its people could live in peace. From then on, the people of the island named the cave after her, and it has been known as Trung Trang Cave ever since.

What you will see inside the cave

The walk through Trung Trang Cave feels like moving from one legend to the next, since almost every formation along the way has a story attached to it.

Just inside the entrance

Right at the entrance, visitors come face to face with a rock formation shaped like a young woman leaning into the cave wall, and nearby is a formation shaped like a giant python. Legend says this is the sacred creature Lady Trung Trang placed here to guard the entrance.

About 20 meters in, the lady's treasure chamber

A little further in, the cave opens into a chamber legend calls Lady Trung Trang's treasure room, with stalactites shaped like columns of gold and silver and a hoard of glittering diamonds. Look closely and you can pick out shapes said to resemble the eagle that stole the princess in the folk tale of Thach Sanh, the cranes engraved on the Dong Son bronze drum, and a black stone turtle known as Hac Quy, said to be one of the lady's soldiers. A golden furred lion formation nearby is said to be the guardian watching over the treasure.

Deeper into the cave

Past the treasure chamber, the cave opens into vast domed ceilings woven together with narrower passages, so the walk starts to feel like moving through a maze. Toward the middle, keep an eye out for a formation said to trace the shape of Vietnam and the Cat Ba islands, followed by shapes that visitors compare to an ancient mummy and a pool with a crocodile in it. A cluster of rock formations nearby rings out gentle tones when tapped, much like a simple stone instrument. Two narrow passages here are known locally as the road to heaven and the road to the underworld, and one large chamber holds strange marks on the wall said to be handprints and footprints from where the lady once practiced her martial arts.

The Cat Ba langur and the lady's sword

Near the end of the walk is a formation shaped like the Cat Ba langur, a creature found only on this island and nowhere else in the world. Beside it is what legend calls the lady's sacred sword, said to be passed down to protect Cat Ba for generations to come. Near the cave mouth stands a small shrine to the lady of the cave, with an elephant and a snake standing guard on either side.

Light, shadow and the creatures who call it home

Part of what makes the walk so memorable is the play of light inside. In places where narrow gaps reach up to the surface, natural light slips through and creates a striking pattern of light and shadow along the walls, and where a flashlight catches the stalactites directly, the mineral surfaces seem to sparkle.

The cave is also home to more than bats. Beetles and spiders have made a home in the cracks of the rock, and moss, lichen and several kinds of fungi thrive in the cool, damp air throughout the cave.

The cave's other names and its role in the war

Trung Trang Cave carries more than one name, and each one comes from its own piece of history. Local people often call it Bat Cave, because thousands of bats, of several different species, live inside. During the resistance war against America, a communications unit from the naval command used the cave to house radio equipment and to station troops between 1964 and 1968, which is why it is also known as Navy Cave. Traces of that time remain inside today, including a water tank and a room once used for meetings and cultural gatherings for the soldiers stationed there.

Trung Trang Cave, together with a number of other caves in the area, has also yielded traces of ancient Vietnamese people who lived on the island more than 6,000 years ago, in places such as the Cai Beo site, Eo Bua cave and Tien Duc cave.

How the cave was formed

Trung Trang Cave took shape over tens of millions of years, as underground water moved through cracks in the limestone karst and slowly wore the rock away, leaving behind the stalactites and stalagmites you see today. It is a slow process, with stalactites usually growing about 0.13 mm a year, though in spots with more mineral rich water that can reach up to 3 mm a year. The Cat Ba National Park website notes that weathering from seawater played a part too, over that same span of millions of years.

Before you go, a few tips

Light inside the cave is limited, so bring a flashlight or a headlamp rather than relying on your phone. Wear hiking shoes with good grip, since the path can be slippery, and pack a light jacket, because the air inside stays noticeably cooler than outside even though it is humid. Carry drinking water and a small snack for the walk.

If you are not used to exploring caves, it is worth hiring a local guide, both for safety and to hear the stories behind each formation as you go. Please help protect the cave for the next visitor too, by taking your rubbish with you and not touching the stalactites and stalagmites, since they are fragile and take years to form.

A one day itinerary combining the cave with other sites

Trung Trang Cave sits so close to the national park headquarters that it pairs naturally with a morning of hiking. Start early at the Cat Ba National Park entrance, walk the short trail to the cave first while the air is still cool, then continue on to one of the park's hiking routes such as the trail to Ngu Lam peak.

By early afternoon you can be back at the park entrance and ready to head to the coast, whether that means a swim at one of the Cat Ba beaches or a boat trip out into Lan Ha Bay.

Frequently asked questions

Is Trung Trang Cave open right now?

Yes. Trung Trang Cave reopened in September 2026 and is receiving visitors as normal. Opening hours are 8:00 to 17:00.

How do I get to Trung Trang Cave?

Most visitors rent a motorbike and ride there themselves. A taxi costs about 350,000 to 400,000 VND one way and takes around 30 minutes from Cat Ba town.

How much does it cost to visit Trung Trang Cave?

Entry is included in the Cat Ba National Park ticket, which costs about 80,000 VND per adult.

What are the opening hours?

The cave normally opens daily from 8:00 in the morning to 5:00 in the afternoon.

How long does it take to walk through?

Most visitors take 30 minutes to an hour, depending on how many stops they make along the way.

Is Trung Trang Cave far from Cat Ba town?

It is about 12 km from the Cat Ba tourist center, but only about 1 km, or a 10 minute walk, from the Cat Ba National Park headquarters.

What is the legend behind Trung Trang Cave?

Local legend says Lady Trung Trang led the island's people to fight off invaders, then came to rest and meditate inside this cave. The people of Cat Ba named the cave after her in gratitude.

Do I need a guide to visit Trung Trang Cave?

You do not need one, since the path is paved and lit, but a local guide is worth hiring if you are new to caves or want to hear the stories behind the formations as you walk.

Ready to explore more of Cat Ba Island? Plan the rest of your trip with our other guides at Beka Travel.

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