1. Overview of Thien Long Cave
Located in Phu Long commune, Cat Hai district, Thien Long Cave (also known as Phu Long Cave) is one of the most attractive natural wonders of Cat Ba National Park. Nestled among limestone mountains and lush mangrove forests, the cave attracts visitors with its mysterious beauty, unique rock formations and peaceful space. Discovered by locals in the early 2000s, this cave quickly became a popular destination for nature lovers and adventure seekers visiting Cat Ba National Park.
Not only is it a natural beauty, it is also rich in cultural and historical value. Local legend has it that the cave was once a pirate hideout, while archaeological finds have revealed traces of ancient inhabitants. With its combination of stunning geology, local stories and serene scenery, this is truly a must see stop on your Cat Ba National Park tour, an ideal destination for those seeking both adventure and tranquility in the heart of nature. 2. Thien Long Cave Tours
If you are planning to explore Thien Long Cave, one of the hidden treasures of Cat Ba National Park, there are many interesting tours for nature lovers and adventurers. From short eco tours through the mangroves to full day expeditions, the choice depends on your budget and time.2.1. Thien Long Cave Tickets
The entrance fee is very affordable:- Adult: 80,000 VND/person
- Children: 40,000 VND/person
If you want to travel on your own, you can take a motorbike or car from Cat Ba town to Phu Long and buy tickets to Thien Long Cave on the spot. 2.2. Half-Day Mangrove & Thien Long Cave Tours
This half-day eco adventure is perfect for travelers looking for a nature experience but short on time. The journey typically starts in Cat Ba town and then travels to Phu Long commune, where visitors board a small boat to cruise through peaceful mangrove canals before entering Thien Long Cave. Inside the cave, you will discover three spectacular chambers filled with sparkling stalactites and stalagmites in the shapes of dragons, turtles and gods. Entering through a narrow entrance, visitors will be greeted by a spectacular underground world, a maze of interconnected chambers, decorated with arched ceilings and deep circular niches, ranging from 1.5 to 2 meters high.
The first chamber reveals a graceful column of stone that seems to change with the light and shadow. Visitors can gently tap the hanging stalactites, which resemble trees, and listen to the echoes they make. Just be careful not to tap too hard to preserve their fragile beauty. In the second chamber, natural stone arches form multiple doorways, leading to tiered stalactite stairs that look like a scene from a fairy tale. Giant rock formations shaped like mythical creatures welcome explorers deeper into the Thien Long cave. To reach the final chamber, travelers climb over a turtle-shaped rock, the symbolic guardian of Thien Long Cave. Here, the cave splits into two sides: the Palace of the Gods on the left and a Buddhist sanctuary on the right, where stalactites naturally form golden thrones, dragon-carved columns, and celestial figures. Guides often share fascinating local stories, from legends of pirates who once hid inside to myths explaining why it’s called Thien Long Cave. 
This half-day tour of Thien Long Cave lasts about 3 – 4 hours, priced at around 600,000 – 1,000,000 VND/person includes a scenic boat ride through the mangroves, the cave entrance, a local guide, transportation from Cat Ba town, and Thien Long Cave tickets. This short but rewarding journey perfectly combines nature, history and culture, giving visitors a magical glimpse into the hidden beauty of Thien Long Cave. 2.3. Full-Day Thien Long Cave & Local Experience Tour
For visitors who want to connect more deeply with the nature and people of Cat Ba, the Thien Long Cave full-day tour will extend the journey beyond the cave. This tour usually combines exploring Thien Long Cave, exploring the mangrove forest and visiting Phu Long village, where visitors can meet local fishermen, enjoy fresh seafood and learn about the daily activities of the local people.
After exploring the enchanting caves, you will take a leisurely boat trip around the lush mangrove forests, home to rare animals in this brackish water ecosystem. Some restaurants also offer kayaking services or a traditional lunch at a floating restaurant, allowing you to enjoy the authentic taste of Cat Ba in the middle of nature.The full-day Thien Long Cave tours typically last 6 – 8 hours and offer a complete eco-cultural experience. Priced at around 1,000,000 – 1,800,000 VND per person (depending on group size), the package usually includes Thien Long Cave tickets, visits to the cave and mangrove forest, a local lunch, and a relaxing village walk with optional kayaking for those seeking extra adventure. This all-in-one journey allows travelers to fully immerse themselves in the natural charm and authentic local life. 3. Tips for visiting Thien Long Cave
Planning ahead for your visit to Thien Long Cave will help you enjoy your trip to the fullest. Here are some helpful tips to ensure a smooth and enjoyable experience inside this stunning natural wonder- Book tour early: Especially during peak season, as many tour packages that include Thien Long Cave tickets often sell out very quickly.
- Bring a flashlight or use your phone light: Some parts of the cave can be dimly lit, and extra light will help you see the delicate stalactite formations more clearly.
- Wear non-slip shoes: Caves can be wet and slippery, so comfortable and sturdy footwear is essential.
- Best time to visit: From April to October, when the weather is dry and pleasant for both mangrove boat rides and cave exploration.
- Pack essentials: Carry water, light snacks, and basic medicines such as insect repellent or pain relief tablets, especially for full-day Thien Long Cave tours.
- Keep the cave clean: No littering. Protecting the pristine environment helps preserve Thien Long Cave.