Get the full picture of the twin caves of Hang Tien, both with enormous entrances and staggering formations. Sleep under the stars in two different campsites, bushwhack through the jungles, and eat delicious, freshly prepared food. This tour is for adventurous travelers who want the full experience of the two biggest caves in the Tu Lan system.

  • Trek over jungle hills and mountains and walk through rivers.
  • Explore the two biggest caves in the Tu Lan system.
  • Discover some other Tu Lan caves as well!
  • Sleep in two very different campsites.
  • Tuck into freshly cooked meals during the journey, plus snacks.
  • Marvel at beautiful and unusual cave formations.

Key Information

  • Duration: 4 days 3 nights (2 nights jungle camping and 1 night at Tu Lan Lodge)
  • Three days exploring 4 huge caves, 5 tropical jungle valleys, rivers and waterfalls.
  • Campsites: Hung Dung Camp is by the crystal clear river, Hang Tien Camp is at the infinity natural swimming pool and by the river.
  • Not available in October due to annual flooding. Available throughout the rest of the year
  • Tours depart every Tuesday and Saturday
  • Group size: 10 people maximum
  • Age: 16 years and above. 15 year olds with experience will be considered.
  • Distance: 18km trekking, 4km caving, 100m swimming, 1300m elevation gain, two 10m ladder climbs
  • Difficulty: Level 4 • Challenging
  • Itinerary (below) is subject to change with the weather. Paths can be slippery and muddy after rain
  • Tour code: HT3


Due to the weather conditions the itinerary may need to be changed at short notice. The paths can be muddy and slippery after rain.

Day 1: Phong Nha – Tan Hoa – Secret Cave – Hung Ton Cave – Hung Dung Campsite

07:00 - 07:30 Pick up and one-hour drive on Day 1 to the Oxalis Adventure office in Tan Hoa, located 70km from Phong Nha. Here you will have a tour safety briefing, sign the release form and receive the required equipment for the tour.

The trek starts with a flat path past the peanut field and grazing buffalo and cows. A river crossing leads to a short but steep and rocky uphill section. At the top you will enter Secret Cave, a short but beautiful cave. Descend to the next valley. Cross the valley on a flat path to enjoy a picnic lunch in the entrance of Hung Ton Cave. Continue through Hung Ton Cave to a 10m ladder descent with a safety line. Reach the underground river and swim out of the exit to To Mo Valley. Enjoy a swim in the lake before heading up out of the valley. Another steep hill follows before you descend to Hung Dung and your campsite.

Day 2: Hung Dung – Hung Nhai – Tien Campsite

The second day is a long trekking day over hills and through beautiful valleys and jungle.

You will cover a total of 8km with a 350m ascent. From the campsite, you will head uphill and trek through the jungle to Hung Nhai, a pleasant and mainly flat scenic valley. Lunch will be next to the river, before the last big hill of the day. Ascend and descend around 200m to arrive at a different river valley. A short trek upstream leads you to your campsite and beautiful blue lagoon. Here the underground river wells up providing a cool natural swimming pool. Relax and enjoy this after your long hike.

Day 3: Hang Tien 1 – Hang Tien 2 – Tu Lan Lodge (Tan Hoa)

In the morning the trail is a large jumble of rocks to pick your way over, with the help and direction of the guide and safety team. As you enter the cave you will appreciate the full size of the passage. Plants and algae cover many of the calcite formations. Further, into the cave you will see splendid cave features such as a ceiling dome, and multiple layers of rock, giving the walls a stripy appearance. A 10m ladder will be climbed up with a safety rope, and a short distance later you will see the end of the cave, an opening into the jungle.

Continue into the jungle valley and trek for around 30 minutes to the second cave. A small opening with swirling stripy patterns on the walls drops into a much larger passage filled with calcite formations. The final challenge of the Expedition now follows. Enjoy the lunch served in a small valley on the way and climb up around 200m on a rocky trail. Take your time, this is not a race. From the top the descent is initially steep and rocky, and up and down, but soon joins an old logging trail, and then a fairly flat forest walks back to the road. Here you will be picked up with a welcome cold drink.

At 18:00, you will go to the porters' house for a delicious dinner, learn about the local culture and living condition before returning to Tu Lan Lodge.

Day 4: Departure

In the early morning, you can enjoy remarkable scenery, rustic villages with beautiful local people in Tan Hoa on foot or by bike. Then enjoy breakfast at Tu Lan Lodge. The check-out time of the hotel will be 12:00 PM.

Please let us know in advance if you would like additional night(s) at the hotel and we can reserve that for you.

If you are interested in other trekking tours or sightseeing activities in the Phong Nha - Ke Bang area, don't forget to contact our reception for consultation and reservation.

You will check out the Tu Lan Lodge and will be transferred from Tan Hoa - Dong Hoi in the morning. Please contact our adventure consultant and inform your tour guide of your departure time the night before to arrange a transfer. We wish you all the best in your onward travels!

Adventure Level

Hang Tien Exploration
Adventure Level 4 · Challenging

Requires: Regular physical activities or sports
Expect: Rocky terrain, long trek and short ladder climb

  • Moderate trekking - very rocky terrain
  • 18km of trekking including 4km of caving
  • 1300m elevation gain
  • River crossings
  • Swimming in caves (100m)
  • There will be some rocky terrain, steep hills and a 10m ladder climb with a safety rope, operated by the safety team
  • How do I get to Phong Nha?

    If you are arriving from oversea, there are two main international airports connect with Dong Hoi Airport: Noi Bai International Airport (Hanoi Capital) in the north and Tan Son Nhat International Airport (Ho Chi Minh City) in the south. There’re many daily flights connecting between 2 main airports with Dong Hoi Airport. From Dong Hoi airport you can get a taxi to Phong Nha which takes around 45 minutes. You can choose other means of transportation. From Hanoi, Ninh Binh, Hue, Da Nang, Hoi An to Phong Nha by sleeper bus, or to Dong Hoi City by train. If you are planning to our tour once arrived in Phong Nha then please make sure your bus/train arrives before 6:00 am to take your tour on time.

    If your arrival time is too early, please contact us to get a FREE dorm bed at Oxalis Home to have a few hours rest before taking the tour. We have gathered all information regarding arrival and departure in the link below, please check for more details.

  • What is the weather like?

    The weather in Phong Nha is quite mild and divided into 4 main seasons.
    • Mid-November to early March: the weather is quite cold, the temperature ranges from 12-15°C;
    • Mid-March to late June: dry season, quite stable weather, light showers, temperatures in the range of 22-38°C (May to June is usually the peak heat wave, the temperature can rise up to 38 degrees);
    • Mid-July to mid-September: hot season, increased rainfall, temperature ranges from 25-35°C.
    • Mid-September to mid-November: rainy season, usually with prolonged heavy rain, possible flooding.
    Prior 1 day to your arrival to Phong Nha, you can conveniently check the weather forecast and prepare for your trip accordingly, here: accuweather.com
    This website shows an approximately accurate weather forecast of the area.

  • What benefits will I enjoy if I book multiple tours and services with The Oxalis Group?

    The Oxalis Group has four primary members:
    Oxalis Adventure: Asia’s biggest adventure tour operator, conducting jungle and cave tours in the Phong Nha – Ke Bang National Park and Tu Lan Cave System.
    Chay Lap Farmstay & Resort: One of the top accommodations in Vietnam, blending a rustic countryside aura with luxury.
    Son Đoong Bungalow: Based in the prime location of Phong Nha - Ke Bang National Park, Son Doong Bungalow offers unique features of indigenous culture, magnificent landscapes and hospitable locals.

    • You will receive a 10% discount for the second tour and onwards for Oxalis Adventure - Xiều Oxalis.
    • You will enjoy a 10% discount for room at Chay Lap Farmstay.
    • Discount for room bookings at Son Doong Bungalow at just VND 800,000/night (valid until 31/12/2022). Applicable to all guests booking tours with Oxalis Adventure during the tour processing time.

    Our consultant will happily assist you, should you need further details on these benefits.

  • Where would the excess luggage be kept and how much luggage would the porters carry on tour?

    Your luggage will be kept at the offices in Phong Nha and Tan Hoa. For high-value belongings, please inform the staff, so that it can be stored safely in the locker.
    With 1-day tour, guests' items are not too many, so safety assistants can assist guests. In case guests have a lot of items, they will prepare a medium-sized backpack (type 15-20L) and bring it on their own during the journey.
    For 2-3 day tours, guests' equipment used at the camp will be supported by Oxalis porters, the maximum weight is 3kg / person / tour. The daily necessities will be brought by guests, Oxalis provides floating backpacks for visitors to Tu Lan, Hang Tien and Hang Va tours, guests prepare their own medium-sized backpacks (type 15-25L) when participating in Hang En and Son Doong.
    Similar provisions for the Tu Lan 4-day tour, however, luggage used at the camp has a maximum weight of 5kg / person / tour.

  • What if I am a solo traveler, can I join a group?

    Solo travelers are most welcome and make up a large percentage of most groups.

  • Why do I have to sign your Release Form?

    We require customers to sign our Release Form to confirm they accept this is an adventure tour and they have to follow our guide’s instructions and safety rules. Customers also accept they have some responsibilities for their own safety.

  • I am not a good swimmer, can I join this tour?

    Excellent swimming skill is not required for this tour. For the 100-meter swimming part, all participants will be swimming lifejackets - even if they are an expert swimmer. Moreover, our safety assistants team will always be around to intervene and support when needed.


Please visit our FAQ general page to read our specific What to Bring list before departing for Vietnam and your cave expedition.


  • Camping gear: tent, camp light, sleeping bag, mattresses, pillow
  • Caving & safety gear: caving helmet, caving headlight, gloves
  • Light PVC backpack (if you do not want to take your own, as it will get wet)
  • Meals: picnic lunches, dinner (day 1, 2 & 3), breakfast (day 2, 3, 4)
  • Basic canvas trekking boots (only if you do not have your own pair) sizes 36 – 46
  • Professional English-speaking tour guide and safety assistants
  • Porter team to carry all camping gear and prepare all meals
  • Shared dry box for phones and small cameras (limited availability for larger cameras)
  • Water filter (used only by guide and porters) and water bottle
  • Basic camping facilities with eco-friendly compost toilet using western toilet seat
  • First Aid Kit and Medical Rescue Equipment (application by guides and porters only)
  • Secure Storage Facility at Oxalis Headquarters to store all luggage you will not be taking on the trek
  • 1 night stay at Tu Lan Lodge after the tour
  • Dinner at porter's house
  • Transport from Tan Hoa - Dong Hoi (maximum 2 vehicles/tour)


  • 2 long (easy to dry) pants and 2 long sleeved shirt to wear during the trek (quick dry)
  • 1-2 pair of short and t-shirt to wear at campsite and swim suit
  • 1 pair of good-gripping and non-waterproof trekking boots/shoes (if you prefer your own comfortable pair)
  • 1 pair of flip flop (sandals) for campsite
  • 1 medium size towel
  • 2-3 pairs of calf length densely woven socks (not ankle socks!)
  • Personal items: mosquito repellent, sunglasses, hat, camera, underwears, toiletries

Pricing and availability

Please choose your departure date using the calendar below.

  • Tour price is USD 426 or VND 9,900,000.
  • The days in bold below are available (Day 1 in the itinerary).
  • This tour is operated from mid-Nov to mid-Sep next year (closed from mid-Sep to mid-Nov).
  • This tour price includes: VAT, environmental service fee, entrance fees, travel insurance cost.
  • 10% off for Xiều (returned customer).
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Whether you prefer long treks, camping in a cave, sleeping under the stars in the jungle, swimming underground in river caves, explore the huge dry caves or just taking an exploratory day trip, Oxalis Adventure Tours can provide the right amount of adventure just for you.

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