The Most Beautiful Caves in Halong Bay

Halong Bay is famous for its spectacular view, limestone islands, and cruises. But one of the best parts of visiting this place is exploring the amazing caves hidden inside the towering rocks.

These caves were formed by nature over thousands of years. So far, about 60 caves have been found, and 49 of them are inside the core area that UNESCO has recognized as a World Natural Heritage Site.

In this post, we'll take you through 8 of the most beautiful caves in Halong Bay, each one with its own charm and story.

Sung Sot Cave

Location: Bo Hon Island, 14 km from Tuan Chau Port

Sung Sot is one of the most famous caves in Halong Bay. The name means "Surprising Cave," and once you step inside, you’ll understand why.
The cave has two big rooms. The first room looks like a concert hall, with colorful lights and amazing rock shapes. The second room is even bigger and can hold thousands of people. Inside, the rocks are shaped like animals, people, and even dragons. Some of them are said to tell the story of Saint Giong, a hero in Vietnamese legend.

Why visit: It’s big, beautiful, and full of interesting shapes and stories.

Thien Cung Cave (Heavenly Palace Cave)

Location: Dau Go Island, 4 km from Tuan Chau Marina

Thien Cung means "Heavenly Palace," and the cave really does feel like a magical place. The rocks inside shine with soft, glowing light. Many people say it looks like the home of gods and fairies. According to legend, this is where the Dragon King and his Queen once lived with their 100 children. Tour guides often share this tale while you walk through the cave’s three rooms. This cave is included in the itinerary of day cruises.

Why visit: Its magical light.

Luon Cave

Location: Northeastern Bo Hon Island

Luon Cave is different from the others as it’s the tiniest cave in the bay. This cave gets its name from the Vietnamese word “luồn,” which means to bend or duck—something you’ll definitely do while kayaking through. With half underwater, you can only enter the cave by kayak or small boat, and you’ll have to duck your head to go through the low opening. Once you pass through, you’ll find a quiet lagoon surrounded by tall cliffs and green trees. It’s a peaceful place where you might see monkeys, birds, and fish.

Why visit: A calm and fun cave to explore by kayaking or bamboo boating.

Tien Ong Cave (Old God Cave)

Location: Cai Tai Island, about 18 km from Tuan Chau

This cave is special not just for its beauty, but also for its history. Half of the cave is bright with sunlight, and the other half has large rock shapes that look like an old man—hence the local name: "Old God Cave." Archaeologists found tools, bones, and shells here from people who lived more than 8,000 years ago. Today, the cave is used like a small museum with over 200 ancient items on display.

Why visit: A peaceful cave where you can learn about Vietnam’s ancient past.

Dark and Bright Cave

Location: Between Halong Bay and Lan Ha Bay

This is actually a pair of caves: the Dark Cave and the Bright Cave. The Dark Cave is often underwater, so most of the time, you’ll only be able to visit the Bright Cave. You’ll need a kayak or boat to enter. Inside, there’s a hidden lagoon with green water, quiet air, and towering limestones all around. It’s one of the most relaxing spots in the bay and often included in Lan Ha Bay cruises.

Why visit: Kayaking, bamboo boating.

Me Cung Cave (Maze Cave)

Location: Lom Bo Island, 2 km from Tuan Chau Marina

Me Cung means “Maze Cave,” and you’ll understand the name as soon as you walk in. Inside, the cave is divided into multiple chambers and levels, and you really can get turned around—which is part of the fun. Scientists found fossils and shells here from people who lived 7,000 to 10,000 years ago. It’s like walking through both a maze and a museum.

Why visit: A fun and mysterious cave with real pieces of ancient history.

Thien Canh Son Cave

Location: Cong Do Island, Bai Tu Long Bay

Thien Canh Son is the biggest cave of Bai Tu Long Bay, the neighbor of the main Halong Bay. To reach it, you need to climb 100 stone steps. But at the top, you’ll get rewarded with amazing views of the bay and islands. Inside, the rock formations look like lotuses, elephants, and hanging lamps. Thanks to the authentic and less touristy feel of Bai Tu Long Bay, this cave is a great choice for anyone who wants a quiet and peaceful visit.

Why visit: Less touristy and beautiful.

Dau Go Cave

Location: Dau Go Island, 300 meters from Thien Cung Cave

Dau Go is one of the oldest discovered caves in the bay and was once referred to by the French as the “Grotte des Merveilles,” or Cave of Wonders, by a travel magazine in 1938. The cave features large stone chambers, moss-covered walls, and towering stalactites shaped by dripping water over thousands of years. Some rare swallows even nest near the entrance.

Why visit: A quiet, green cave with rich wildlife and a special history.