Phong Nha: A Guide To Must-See Sights And Activities

What to see in Phong Nha: Vietnam’s underground wonders

Phong Nha in Quang Binh province is renowned as Vietnam’s cave kingdom. This remarkable destination boasts some of the planet’s most awe-inspiring subterranean scenery. From immense dry caverns to enchanting river caves, Phong Nha offers travelers an extraordinary journey into the hidden wonders of Vietnam’s natural world.

Phong Nha Cave

Phong Nha Cave is one of the highlights of the area and has been hailed as one of the world’s most extraordinary caves. It boasts the longest underground river on the planet, stunning sandy banks, striking coral reefs and spectacular stalactites. As the first cave in the region to open to the public in 1997, it was once the largest known cave in Vietnam.

Beyond its natural beauty, the cave carries historical significance. Today, visitors can explore its wonders by taking a relaxing ride on a traditional dragon boat along the underground river, making it an accessible adventure for all fitness levels.

Paradise Cave (Thien Duong Cave)

Paradise Cave, also known as Thien Duong Cave, is a marvel of nature and holds the title of the world’s longest dry cave. Its grand, cathedral-like interior inspires awe with intricate rock formations that feel both divine and serene. This cave is a must-see for those who appreciate the majesty of nature.

Hang Toi Cave (Dark Cave)

For those seeking adventure off the beaten path, Hang Toi Cave or Dark Cave, offers an unforgettable experience. Recently discovered and still preserved from mass tourism, it stands as one of the most beautiful and adventurous caves in the region. Exploring this cave involves activities like kayaking, zip-lining and even mud bathing, making it perfect for thrill-seekers.

Phong Nha is a destination that promises an unparalleled mix of natural beauty, historical intrigue and adventurous fun. Whether you’re gliding through its serene waterways or marveling at its cathedral-like caves, Phong Nha’s wonders will leave you spellbound.

Son Doong Cave

Access to Son Doong is restricted and requires expertise in caving, as well as a significant financial investment. The journey isn’t for the faint of heart, but those who take on the challenge are rewarded with an awe-inspiring adventure like no other.

Son Doong Cave is nestled in Phong Nha-Ke Bang National Park, a UNESCO World Heritage Site that’s home to some of the world’s most remarkable caves. While it remains off-limits to most travelers, its mere existence adds to the allure of Phong Nha as a destination for intrepid explorers and nature enthusiasts.

What makes Son Doong unique?

• Size beyond imagination: Measuring 152 meters in height and stretching 9 kilometers in length, Son Doong dwarfs other caves in scale.

• A recent discovery: First discovered and explored in 2009, the cave was only opened to the public in 2013, offering an exclusive and relatively untouched adventure.

• Spectacular features: It’s famous for its two massive dolines, or sinkholes, that let sunlight stream into the cave, creating lush underground rainforests. These skylights offer views that are nothing short of magical.

• The “Great Wall of Vietnam”: A staggering 90-meter calcite barrier stands as a natural wonder within the cave.

• Unusual cave formations: Inside, visitors can marvel at gigantic cave pearls, towering stalagmites, and rare phytokarst formations that make Son Doong a geological masterpiece.

Hang En Cave

Hang En Cave, located in the breathtaking Phong Nha-Ke Bang National Park, is a captivating natural wonder with a rich history and distinctive features. Recognized as the third-largest cave in the world, it’s an extraordinary destination for adventurers.

Hang En was first officially explored by British caving experts in 1994, but its existence has been known for centuries by local ethnic communities like the Bru Van Kieu from Ban Doong village. These villagers used the cave as a shelter during violent storms and a hunting ground for swifts, which were considered a delicacy.

Why Hang En stands out?

• A Hollywood star: Hang En gained international fame after being featured in the Hollywood blockbuster Pan (2015), starring Hugh Jackman.

• Camping in the cave: Unlike most caves, Hang En offers a rare experience—camping inside its massive entrance. Imagine spending a night surrounded by stunning rock formations and illuminated by natural light streaming in from the openings.

• Named after swifts: The cave is home to thousands of swifts (known locally as "En"), which nest in the cave's high ceilings, creating an enchanting atmosphere.

• A gateway to exploration: Nestled in Phong Nha-Ke Bang National Park, Hang En is part of a region renowned for its incredible caves, including the world’s largest, Son Doong.

Whether you’re drawn by its natural beauty, unique camping opportunities, or historical significance, Hang En Cave is a destination that promises unforgettable memories and a sense of awe.

The Tu Lan Cave

The Tu Lan Cave System, located just outside the boundaries of Phong Nha-Ke Bang National Park, is a breathtaking network of over 20 caves. First explored by British caving experts in 1992, this incredible system has captivated adventurers and researchers alike with its unique blend of dry and wet caves.

First explored in 1992 and further studied in-depth in 2010, the Tu Lan caves have been known to locals for centuries. Though situated outside Phong Nha-Ke Bang National Park, the area is an integral part of the region’s famed cave systems, which include some of the largest caves in the world.

A world of discovery:

• Over 20 caves: The Tu Lan system is not just one cave but a series of over 20 interconnected caves, offering a mix of both dry and wet caverns.

• Stunning surroundings: These caves are linked by vast rivers and surrounded by picturesque landscapes of bison fields, peanut farms, and dramatic karst mountains.

• Hollywood fame: The Tu Lan system was featured in the 2017 Hollywood blockbuster Kong: Skull Island, starring Tom Hiddleston, Samuel L. Jackson, and Brie Larson.

• Camping adventures: While you can’t sleep inside the caves, the nearby campgrounds offer an incredible outdoor experience close to the cave entrances.

For thrill-seekers and nature enthusiasts, the Tu Lan Cave System is an adventure not to be missed.

Hang Tien Cave

The twin caves of Hang Tien were first visited by the British Cave Research Association in 1994, with further exploration taking place in 2015. Located outside of Phong Nha-Ke Bang National Park, this remote part of Vietnam was challenging to access, with locals providing invaluable assistance to locate the cave entrances.

A twin wonderland:

• Not one, but two caves: Hang Tien consists of two of the largest caves in the Tu Lan cave system, offering both vast sizes and unique formations.

• Fairy tale vibes: Known as "Fairy Cave" (Hang Tien) due to the otherworldly environment that inspired local legends of mythical beings.

• Outdoor camping: While it’s not possible to sleep inside the caves, there are beautiful jungle campsites near the cave entrances, offering an adventurous experience.

• Beyond the park: Located just outside Phong Nha-Ke Bang National Park, Hang Tien is part of one of the world’s most spectacular cave regions.

Hang Va Cave

Discovered more recently in 2012, Hang Va has been subject to research into a potential connection to Son Doong, the world’s largest cave. Though no direct connection exists above ground, there is likely an underwater link between the two.

Unique formations and features:

• Ice-cream cone stalagmites: One of the most fascinating features of Hang Va is its unusual stalagmites, which resemble upside-down ice cream cones. Their formation remains a mystery.

• Crystal clear pools: Hang Va is also famous for its massive crystal-clear pools.

• Shared water flow: Hang Va shares the same water flow with Son Doong, the largest cave in the world.

• Camping in the jungle: While you can’t stay inside the cave, nearby jungle campsites offer a comfortable base for exploring the area.

• Inside Phong Nha-Ke Bang: Situated within Phong Nha-Ke Bang National Park, Hang Va is part of the world’s most extensive cave systems.

Nuoc Nut Cave

Nuoc Nut Cave, discovered in 2003, is another hidden gem in the region, with a fascinating connection to Hang Va, discovered in 2016. Although there is no physical link to Son Doong, both caves likely share the same underground water flow.

A diverse cave system:

• Varied features: Nuoc Nut is a diverse cave with an underground river, rock pools, areas with natural light, and pitch-black corners, creating a unique cave environment.

• The shortest adventure: It’s the only cave in Phong Nha-Ke Bang National Park that can be visited in a single day, though it can also be included in two-day adventure tours, often combined with Hang Va.

• Ancient origins: With an estimated age of around 2 million years, this cave is a geological marvel.

• Shared Water Flow: Like Hang Va, Nuoc Nut shares an underground water flow with Son Doong.

• Explored in 2003: The cave was discovered and studied by the British Cave Research Association in 2003, adding to the region's rich underground heritage.

These caves, including Son Doong, Hang En, the Tu Lan network, Hang Tien, Hang Va, and Nuoc Nut, have been explored and opened to the public with the help of Oxalis Adventure. Each cave offers its own distinct adventure and awe-inspiring natural beauty.

What to do in Phong Nha: A guide to must-do activities

Phong Nha is more than just caves—it’s an adventure playground for nature lovers. Surrounded by lush jungles, limestone mountains, and tranquil rivers, this UNESCO-listed destination offers plenty of outdoor experiences. Here are some of the must-do activities when visiting Phong Nha:

Kayaking

Another way to explore Phong Nha Cave is by trying a kayaking excursion away from the crowds. Hang Toi, just a few kilometers away, also offers a fun selection of activities, including kayaking, swimming, and zip-lining. Planning a kayaking adventure? Feel free to contact us!

Hiking

The landscape of Phong Nha-Ke Bang National Park is unlike anywhere else in Vietnam. If caves aren't your thing, opt for a hike to discover the lush scenery of Phong Nha. Organized hiking tours are the best way to explore, as local experts will take you along hidden trails unknown to other travelers.

If you're a wildlife enthusiast, consider a night excursion or visit the wildlife rescue center during a two-day eco-hike. Hanoi Voyages offers the best hiking tours in the region.

Cycling tour

A beautiful bike ride along the Son River takes you to the villages of Bong Lai and Gia Hung, where you can join the locals in their daily tasks in the rice paddies and peanut fields. You’ll also have the chance to learn how to make traditional Vietnamese popcorn.

When to visit Phong Nha?

The central region, including Phong Nha, Danang, Hoi An and Nha Trang for the coastal part, as well as the central highlands near the Cambodia and Laos borders.

Dry season: From January to May

Wet season: From August to December, the weather in the central region is slightly hotter than in the North but cooler than in the South. The central region is the most affected by the monsoon from May to October, which is also the hottest season. However, the coast and the highlands are usually cooler.

July to October: Rainfall is more intense, with frequent typhoons.

How many days to visit Phong Nha?

Phong Nha is one of Vietnam’s most extraordinary destinations, home to stunning caves, pristine jungle, and fascinating wartime history. But how many days should you spend here? The answer depends on your pace, but 3 days is the perfect amount of time to enjoy the highlights without rushing.

Day 1: Hanoi – Night Train to Dong Hoi

Arrive in Hanoi.

Explore the city with a cyclo ride through:

• The French colonial quarter

• Hoan Kiem Lake & Ngoc Son Temple

• The bustling Old Quarter, including Silk Street (Hang Gai)

Take a walking tour to soak in the atmosphere of Hanoi’s lively streets.

In the evening, board the overnight train to Dong Hoi, the gateway to Phong Nha. 

Day 2: Exploring Phong Nha Caves

Visit two of the most impressive caves in Vietnam:

• Phong Nha Cave – a UNESCO World Heritage site with underground rivers and dramatic limestone formations.

• Paradise Cave (Thien Duong Cave) – the world’s longest dry cave, filled with cathedral-like stalactites and stalagmites.

Afternoon: Discover the animal rescue center and botanical garden in Phong Nha-Ke Bang National Park.

Day 3: Phong Nha – Hue

• Morning visit to the Vinh Moc Tunnels, an underground village built during the Vietnam War.

• Continue to the Demilitarized Zone (DMZ) and cross the Freedom Bridge over the Ben Hai River, once dividing North and South Vietnam.

• Afternoon transfer to Hue, the former imperial capital and another UNESCO site.

For more details, you can read: Immersion in the Phong Nha Caves

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Where to stay in Phong Nha?

Phong Nha is a fantastic place to immerse yourself in the beauty of the Vietnamese countryside. The best option for nature lovers is to book a boutique homestay or a villa in the rice fields just outside the town. Here, you'll be immersed in rural life and wake up each morning to beautiful views. The town of Phong Nha also offers a wide range of accommodation, including homestays and modest hotels along the river.

Phong Nha Lake House Hotel & Resort

This hotel stands out for its great location and offers dorms, double rooms, and bungalows. The friendly and dynamic team of young women ensures that guests feel comfortable and well taken care of during their stay.

Easy Tiger Hostel

This clean, air-conditioned dorm is run by young locals. It features a cafeteria and a swimming pool, making it a great place for travelers spending a few days or just one night at this guesthouse.

Saigon Phong Nha Hotel

This well-located hotel is near the Song Con River dock. Meals are served on a shaded terrace that overlooks the river, offering a relaxing atmosphere.

Phong Nha is truly a destination where adventure meets nature. Whether you’re paddling along quiet rivers, trekking through lush jungle, cycling past peaceful villages, or venturing deep into its magnificent caves, every moment here feels unforgettable.

Ready to explore Vietnam’s underground wonders? Let Hanoi Voyages design a personalized journey to Phong Nha and beyond, ensuring your trip is seamless, enriching, and full of discovery. Contact us today to start planning your adventure!