Dark and Light Cave: an Ideal Stopover near Halong Bay

The Gulf of Tonkin in North Vietnam has been an attractive landscape for both domestic and foreign tourists who are interested in the stunning beauty of the Vietnam sea. Located in between Halong Bay and Lan Ha Bay, Day and Night Cave is an ideal suggestion to discover a masterpiece of creation in a famous world heritage. Let’s explore what is waiting for you in Dark and Light Cave!

I. Overview of Dark and Light Cave

The geological process in North Vietnam, especially in Halong Bay, created three main types of caves: underground caves, old karst-based caves, and frog-jaw-shaped caves. Dark and Light Cave is a classic frog-jaw-shaped cave, with its floor underwater and ceiling above sea level. Visitors can explore it by boat or kayak.

This site consists of two caves: Dark Cave and Light Cave. Dark Cave is deep, narrow, and often submerged, making it inaccessible. Light Cave is larger, measuring 3 meters high, 4 meters wide, and 100 meters long. Its height changes with the tides, but the water rarely reaches the ceiling, allowing exploration.

The area offers a chance to connect with nature, admire rich flora, and breathe fresh air. Fossils of freshwater snails on the cave walls suggest human habitation thousands of years ago. Visitors can also spot monkeys, shady Benjamin fig trees, and fragrant orchids in bloom.

Dark and Light Cave is also called Day and Night Cave. Many compare it to an “underwater Sung Sot Cave,” another famous grotto in Halong Bay. True to its nickname, the cave’s beauty amazes all who enter.

II. Highlights of Dark and Light Cave

1. Location

Dark and Light Cave lies within the Cat Ba Biosphere Reserve, at the border of Halong Bay and Lan Ha Bay. Its location gives it the best of both bays—the unique geology of Halong Bay and the rich biodiversity of Cat Ba Islands.

Nearby, some famous fishing villages thrive. Locals live in harmony with nature, using its resources while protecting marine life.

2. Beauty

Dark and Light Cave’s beauty is undeniable. Inside, sparkling stalactites hang from the ceiling, resembling bamboo sprouts in a hidden forest. These formations took millions of years to develop.

The cave’s arched ceiling and dark interior create a tunnel-like passage over the water. After a 100-meter journey through the cave, visitors emerge into a hidden lake, enclosed by towering limestone cliffs. Orchids and lush greenery cover the slopes, forming a natural green wall.

This cave is a gateway to a wonderland where sea, mountains, sky, and plants blend perfectly. The breathtaking scenery washes away all fatigue, letting visitors fully embrace nature’s beauty.

III. What to Do in and near Dark and Light Cave?

1. Kayaking Through the Cave

Kayaking in Halong Bay is a must-try activity and Dark and Light Cave is a top spot for it. The cave’s low ceiling prevents large ships from passing, so visitors must use kayaks or small boats.

When your cruise stops outside the cave, you can rent a kayak or a boat to explore. Kayaks hold two people, while reed boats accommodate six to eight.

As you paddle, you may spot fish beneath the clear water, bats hanging from the ceiling, and birds or monkeys on nearby islands. The experience immerses you in nature, offering a peaceful escape from daily life.

2. Tracing Seawater Erosion

The journey to the cave entrance reveals nature’s artistry. Seawater has carved patterns into the limestone foothills, leaving rugged cliffs with unique colors. Strips of seaweed and coral thrive near the surface, while small fish dart through the clear water. It’s a rare and captivating sight.

3. Marveling at Sparkling Stalactites

Inside the cave, stalactites hang from the ceiling like frozen waterfalls. If you visit during a quiet time, you might see bats flying overhead. This explains why the cave is also called Hang Doi, or Bat Cave.

4. Drifting into a Hidden Green Valley

Beyond the cave lies a secluded valley, encircled by towering limestone mountains. The scene feels like paradise. Stop paddling, let the water carry you, and soak in the fresh air. The silence, broken only by nature’s sounds, offers a rare moment of peace.

5. Visiting Cua Van floating village

In the area near Dark and Light Cave, there is a fishing village on the list of 16 most beautiful ancient villages in the world named Cua Van Village. Also located between Halong Bay and Lan Ha Bay, Cua Van Village is one of the must-visit destinations for all tourists coming to Dark and Light Cave.

Over 200 families live in floating houses, making a living from fishing and aquaculture. Locals not only rely on the sea but also actively protect it. The village’s unspoiled charm, nestled within the bay, leaves a lasting impression.

6. Watching the sunset on the sea

On the way back, you can enjoy the romantic sunset on the sea. A romantic scene with cruises anchored in the middle of the vast ocean, surrounded by waters and mountains. Here, set yourself to not be dazed by the beauty of the afternoon. 

IV. How to Get to Dark and Light Cave?

Dark and Light Cave is about 2 kilometers from Sung Sot Cave, a famous cave in Halong Bay. A cruise ship in Halong Bay or Cat Ba Bay is the only way for you to reach Dark and Light Cave.

If you depart from Tuan Chau Wharf in Halong City or Got Wharf in Haiphong City, where you can find some cruise ships to get to the cave. One thing you should note is to contact the travel agency to ensure Dark and Light Cave is on your initial.

A cruise trip to visit Halong Bay often lasts for 4 to 6 hours. If you want to experience more activities, you can go on a night tour in Halong Bay. A lot of interesting things are waiting for you to explore.

>>> Check the cruises that include Dark and Light cave in itinerary:

Halong Bay Cruise 2 Days | Halong Bay Cruise 3 Days

V. Extra Tips

• If you do not know how to row a kayak, you can go on a boat sailed by the locals to discover the interior of Dark and Light Cave.
• Remember to follow the safety instructions like wearing a life-jacket when going on a boat.
• Near Dark and Light Cave, there are many other attractions that you should not miss such as Sung Sot Cave, Thien Cung Grotto, Cat Ba Island, Van Boi Village and so on.
• The best time to visit Halong Bay is from April to July, which is the tourism season there. The weather is favorable and a lot of carnivals are held to attract visitors.

Dark and Light Cave is a wonderful stopover on the edge of Halong Bay. The Mother of Nature has favored this destination with all the characters to become a precious gem of a world heritage. If you have a chance to get to Dark and Light Cave, don’t hesitate to share with us your feelings as well as gorgeous pictures with your friends and family.