Phong Nha: Vietnam's cave country, a full 2026 guide
Beneath the karst mountains of Quang Binh hide more than 300 caves — one of them, Son Doong, is the biggest on Earth. Phong Nha-Ke Bang has been a UNESCO World Heritage Site since 2003. Entry runs from ~$6 to $3,000 for the flagship expedition.
Under the karst mountains of Quảng Bình province hide more than 300 caves. One of them — Son Doong — is the largest on the planet. Another — Paradise — stretches 31 km. A third — Dark Cave — lets you zipline over a river, paddle in by kayak and wallow in mud for 450,000 VND (~$18).
Phong Nha-Kẻ BàngNational Park has been a UNESCO World Heritage Site since 2003. In 2025 UNESCO extended the boundary to take in Laos's Hin Namno park — now the first transboundary karst site in Southeast Asia. And in 2026 surveyors found 26 more caves, including an underground waterfall some 350 metres high.
It sits 500 km south of Hanoi. The nearest airport is Dong Hoi. Give it three days minimum to see the highlights. The easiest way in is a domestic flight to Dong Hoi, then a taxi to the village of Son Trach.
Phong Nha-Ke Bang National Park — what it is
857 square kilometres of karst mountains blanketed in jungle. The geology is over 400 million years old, making this one of the oldest and largest karst regions in Asia.
The park lies in Quang Binh province (Quảng Bình), in central Vietnam. It is 500 km south of Hanoi, 210 km north of Hue and 300 km from Da Nang. The nearest city is Đồng Hới (Dong Hoi), 50 km away.
| Fact | Detail |
|---|---|
| Area | 857.54 km² |
| UNESCO status | Since 2003, extended 2015 and 2025 |
| Number of caves | 300+ (about 30% surveyed) |
| Largest cave | Son Doong (9 km, up to 200 m high) |
| Nearest airport | Dong Hoi (VDH), 50 km |
| Base village | Sơn Trạch (Son Trach) |
In 2026 a survey team logged 26 new caves inside the park, among them an underground waterfall roughly 350 metres tall. The park is nowhere near fully explored — only about 30% of it has been mapped.
The village of Sơn Trạch is the launch pad for every route. Hotels, restaurants, motorbike rental and tour offices all sit here. Base yourself in the village rather than Dong Hoi: it is closer to the caves, has more atmosphere and costs less.
Phong Nha caves — from budget to expedition
- Phong Nha Cave (Động Phong Nha): River cave by boat, 150,000 VND (~$6)
- Paradise Cave (Động Thiên Đường): 31 km long, entry 250,000 VND (~$10)
- Dark Cave (Hang Tối): Zipline, kayak, mud bath, 450,000 VND (~$18)
- Son Doong (Hang Sơn Đoòng): World's largest cave — $3,000 for a 5-day Oxalis expedition
- Hang En (Hang En): World's third-largest cave — ~$300 for a 2-day trek
- Son Trach village (Sơn Trạch): Hotels, restaurants, bike rental, tour offices
Six caves are open to visitors. Three you can do on your own; three require an organised tour. Prices span from 150,000 VND (~$6) to $3,000 for the full expedition.
| Cave | Type | Entry | Time | Difficulty |
|---|---|---|---|---|
| Phong Nha | River, by boat | 150,000 VND (~$6) + boat | 1.5–2 h | Easy |
| Paradise | Dry, on foot | 250,000 VND (~$10) | 2–3 h | Easy |
| Dark Cave | Adventure | 450,000 VND (~$18) | 3–4 h | Moderate |
| Son Doong | Expedition | $3,000 | 5 days | Hard |
| Hang En | Multi-day trek | ~$300 | 2 days | Moderate |
| Tu Lan | Cave system | $150–300 | 1–2 days | Moderate |
Phong Nha Cave — the classic boat ride
Động Phong Nha is the cave that gave the park its name. It runs 7.7 km, with about 1.5 km open to visitors. The only way in is by water: you climb into a motorboat, glide through a rock arch and drift off into the dark. Inside are stalactites, stalagmites and floodlit chambers.
Entry is 150,000 VND (~$6). The boat is 550,000 VND for the whole group (up to 12 people). Solo? You either wait for others to share or pay for the boat yourself. It usually works out to 200,000–250,000 VND (~$8–10) per person.
You can pair it with Tiên Sơn (Tien Son) — a dry cave nearby, covered by the same ticket. Climb the stairs for handsome formations. Allow 1.5–2 hours. No guide needed, good for everyone, kids included.
Paradise Cave — 31 kilometres of underground world
Động Thiên Đường — Paradise Cave. Found in 2005, opened to visitors in 2010. It is 31 km long in full; the public stretch is 1 km on wooden boardwalks. For an extra fee you can go 4.5 km deeper with a guide.
Entry is 250,000 VND (~$10). An electric buggy from the car park to the entrance costs 20,000 VND, then it is a 1.5 km walk up steps to the cave mouth.
The scale inside is staggering. Ceilings rise to 72 metres. Stalactites hundreds of thousands of years old. The lighting turns the chambers into something out of a sci-fi film set.
💬 "The most impressive stalactites I've ever seen. The lit 1 km boardwalk feels like another world." — guest reviews of Paradise Cave, Tripadvisor, 2025
Dark Cave — adrenaline and mud
Hang Tối— Dark Cave. This is not a contemplative stroll but a full-on activity. The circuit: a 400 m zipline over the river → kayak to the mouth → swim into the dark → mud baths inside the cave.
Entry is 450,000 VND (~$18). Everything is included — zipline, kayak, mud and a shower. No hidden extras.
💬 "Dark Cave is the best adrenaline-to-price ratio around: zipline, kayak and a mud bath for about $18. The mud really is therapeutic — your skin feels like silk afterwards." — guest reviews of Dark Cave, Tripadvisor, 2025
Skip the airport queue in 5–10 min
In winter, immigration lines run 60–90 min. With Fast Track you’re met at the aircraft and taken through the priority lane. Arrange it before you fly.
Telegram managerSon Doong — the largest cave in the world
Hang Sơn Đoòng — Son Doong. 9 km long, ceilings up to 200 metres, with a jungle, clouds and a river inside. A local found it in 1991; a British caving team surveyed it in 2009.
The expedition runs 5 days / 4 nights and costs $3,000. There is one operator only — Oxalis Adventures, which holds the exclusive licence. Just 500 permits are issued a year, and they book out 12–18 months ahead, so plan far in advance.
What's included: jungle trekking, nights camping inside the cave, river crossings, all meals and porters for the gear. You need to be genuinely fit — there is a health screening.
Hang En — the world's third-largest cave
Hang En — the Swallow Cave. 1.6 km long, with a 120 m entrance portal. Inside there is a beach, a river and thousands of swifts. The tour is 2 days / 1 night, ~$300, run by Oxalis. Many people find it even more moving than Son Doong — and it is a fraction of the price.
Tu Lan — a cave system for the active
Tu Lan is a whole system of caves with underground rivers and waterfalls. A day tour is ~$150, a two-day expedition ~$300. It is less hyped than Son Doong, but for sheer experience it is one of the best trips in the park.
Which cave to choose
| If you're... | Choose |
|---|---|
| New to caves, travelling with kids | Phong Nha Cave + Paradise |
| After adrenaline on a sane budget | Dark Cave |
| Up for a 2-day trek | Hang En or Tu Lan |
| A caver at heart with a $3K budget | Son Doong |
| Watching the money | Phong Nha (~$6) + Dark Cave (~$18) |
Getting to Phong Nha
The nearest airport is Đồng Hới (code VDH). From Dong Hoi to the village of Phong Nha (Sơn Trạch) it is 50 km, about 45 minutes.
From Hanoi
| Option | Time | Price |
|---|---|---|
| Flight (VietJet / Vietnam Airlines) | 1 h 10 min | $25–50 |
| Train (Reunification Express) | 8–10 h | $15–40 |
| Bus | 10–12 h | $10–15 |
Flying is the sensible choice. VietJet and Vietnam Airlines run daily; book 2–3 weeks out and fares start around $25 one way. The train is for romantics — take the overnight sleeper, board in Hanoi in the evening and wake up in Dong Hoi. The bus is the cheapest but the slowest.
From Hue and Da Nang
From Hue it is a 3–4 hour bus or train, 150,000–200,000 VND (~$6–8). From Da Nang it is a 6–7 hour bus, 200,000–300,000 VND (~$8–12). From Ho Chi Minh City there is a direct flight to Dong Hoi, 1 h 30 min, $30–60.
Dong Hoi → Phong Nha
- Taxi / Grab: 300,000–400,000 VND (~$12–16), 45 min
- Local bus: 100,000 VND (~$4), but infrequent
- Hotel transfer: many offer it free or cheap
Getting around Phong Nha
A motorbike is the main way to get around. Rental is 100,000–150,000 VND (~$4–6) a day. The roads are good and traffic is minimal. Bicycles go for 50,000–80,000 VND (~$2–3) a day and suit the closer caves. Grab works, but cars are thin on the ground.
Where to stay in Phong Nha
Son Trach (Sơn Trạch) is the village at the park entrance. It is 5–15 km from the caves. Quiet, green, with karst peaks in view. Restaurants, rental and tours all sit along one street.
Dong Hoi is the airport city, 50 km from the caves. It has more hotels, a beach, cafés and ATMs. The downside: a 45-minute drive each way, every day. Our pick — stay in Son Trach.
| Category | Examples | Price/night | Best for |
|---|---|---|---|
| Boutique | Victory Road Villas, Chay Lap Farmstay | $40–100 | Couples, comfort |
| Mid-range | Phong Nha Farmstay, Nguyen Shack | $20–50 | Families, balance |
| Budget | Jungle Boss Homestay, Easy Tiger Hostel | $5–15 | Backpackers |
Phong Nha Farmstay is a backpacker legend — pool, bar and a social buzz. It is where travellers meet and form groups for tours. Easy Tiger Hostel starts at $5 for a dorm bed: clean, with Wi-Fi and air-con.
Book ahead in high season (February–April). The rest of the year you can usually just turn up.
Food & restaurants
Quang Binh cooking is simple, filling and heavy on river fish and seafood. A typical lunch is 40,000–80,000 VND (~$1.60–3.20). Dinner with a beer runs 100,000–150,000 VND (~$4–6).
What to try
Bánh bèo — small steamed rice cakes topped with dried shrimp, served ten to fifteen to a plate. A portion is 20,000–30,000 VND (~$0.80–1.20).
Cháo lươn — rice congee with eel. It sounds unusual and tastes soft and gentle. 25,000–35,000 VND (~$1–1.40).
River fish — grilled or steamed. In Son Trach restaurants you pick yours straight from the tank. 80,000–150,000 VND (~$3.20–6) a portion.
Restaurants in Son Trach
Bomb's Craters Bar & Restaurant — named after the bomb craters left by the Vietnam War. Vietnamese and Western food, good burgers, cold beer. Expect 80,000–120,000 VND (~$3.20–4.80) a head.
The Pub with Cold Beer — yes, that is the actual name. Local beer, simple food and a view over the rice fields. Bamboo Cafe does breakfasts, coffee and fresh juices.
Getting set up in Vietnam?
SIM, visas, transfers, tours — our manager sorts it out for you, in English.
Message the managerWeather & when to go
Phong Nha is central Vietnam, with two clear seasons: dry (February–August) and wet (September–January).
| Month | °C | Rain mm | What to expect |
|---|---|---|---|
| Jan | 16–22 | 50 | Cool, dry |
| Feb–Apr | 17–30 | 40–50 | Ideal, high season |
| May–Aug | 25–35 | 60–120 | Hot, but caves open |
| Sep–Nov | 20–31 | 300–500 | Floods, avoid |
| Dec | 17–23 | 80 | Cool, easing off |
Best time: February to April. Warm, dry, every cave and tour running. The land is green after the rains and the rivers are full — without the flooding.
June to August is fine if you can handle 35°C heat. The caves stay cool year-round (+18–20°C).
Trip budget
Three days is the standard length of a Phong Nha trip. Here is what it costs:
| Item | Budget | Comfort | Luxury |
|---|---|---|---|
| Flight Hanoi ↔ Dong Hoi | $50 | $70 | $100 |
| Transfer | $4 | $8 | $16 |
| Lodging, 2 nights | $10 | $60 | $200 |
| Caves (Phong Nha + Dark) | $24 | $24 | $24 |
| Food, 3 days | $10 | $24 | $48 |
| Total | ~$100 | ~$190 | ~$390 |
Budget means a hostel, a motorbike, the two self-guided caves and street food. Comfort is a farmstay, taxis, three caves and restaurants. Luxury is a boutique hotel plus a Hang En trek. Son Doong ($3,000) is a line item all of its own.
Itineraries: 2, 3 and 5 days
2 days — the minimum
Day 1:Land in Dong Hoi → transfer to Son Trach → Dark Cave (zipline, kayak, mud) → dinner at Bomb's Craters.
Day 2: Morning at Phong Nha Cave (boat) + Tien Son. Lunch. Paradise Cave. Evening flight out of Dong Hoi. Three caves in two days — tight, but doable.
3 days — the sweet spot
Day 1:Arrive → Son Trach → Dark Cave → an evening stroll around the village.
Day 2:Phong Nha Cave (boat) → lunch → Paradise Cave (standard route or the 4.5 km extended one).
Day 3:Cycle through the rice fields and villages → lunch → transfer → fly out. Or swap the ride for a Tu Lan day tour ($150).
5 days — the full version
Days 1–3: As above. Days 4–5: A two-day Hang En trek ($300) — trekking, a night camping in the cave, sunrises over the jungle. Or Tu Lan for two days: cheaper, just as powerful.
Practical tips
Bring sturdy shoes (not flip-flops — caves are slippery), a headlamp, swimwear and a towel for the Dark Cave, sunscreen and a waterproof phone case. A light jacket helps: it is +18°C inside the caves.
Mobile data works in the village and on the main roads; there is no signal inside the caves. Hotel Wi-Fi exists but is slow.
There are no serious safety concerns. Traffic is calm (this is not Ho Chi Minh City). Follow the instructions inside the caves. For the Dark Cave you must be able to swim.
The park is a UNESCO site with strict rules: carry your rubbish out, don't touch the stalactites, and expect fines for breaking either.
FAQ
How much does the Son Doong expedition cost?
$3,000 for 5 days / 4 nights. Oxalis Adventures is the only licensed operator. There are just 500 permits a year, booked 12–18 months ahead. The price covers everything: porters, tents, meals, gear and guides. You need to be fit — there is a health screening.
When is the best time to visit Phong Nha?
February to April is the sweet spot. Warm (20–30°C), dry, with every cave and tour running. May to August is hot (up to 35°C) but the caves stay open. September to November is risky — floods can close the park. December to January is cool (16–22°C) but dry and quiet.
Can you visit the caves on your own?
Three caves are open without a guide: Phong Nha (by boat), Paradise and Dark Cave. You buy a ticket at the entrance and walk in. Son Doong, Hang En and Tu Lan are tour-only, through Oxalis or Jungle Boss, and need booking well ahead.
How many days do you need in Phong Nha?
Two days minimum for the three self-guided caves. Three is ideal (all the open caves plus a wander). Five days if you add a Hang En or Tu Lan trek. One day is too little — you will only manage a single cave.
How do you get from Hanoi to Phong Nha?
Fly to Dong Hoi (1 h 10 min, from $25), then a taxi to Son Trach (45 min, ~$14). The overnight sleeper train is 8–10 hours from about $15. The bus is 10–12 hours and the cheapest. From Hue it is 3–4 hours by bus.
Is the Dark Cave dangerous?
No, as long as you can swim. You get a life vest and a helmet, the mud baths are waist-deep and the zipline is harnessed. In 10+ years of operation there have been no serious incidents. Not recommended for children under 10–12.
Which caves are good for kids?
Phong Nha Cave — a boat ride, no effort, any age. Paradise — an easy boardwalk, from about 5–6. Dark Cave — from 12 (must swim). Hang En and Tu Lan — from 14–16. Son Doong is adults only, and fit ones at that.
Phong Nha-Ke Bang is one of those places worth breaking off the beach route for. Three days among underground rivers, stalactites and ziplines, and you will see a completely different side of Vietnam. It is easiest to reach from Hanoi or Hue, its close neighbour to the south.
Prices current as of July 2026. Prices and conditions can change — check official sources before you travel.