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The perfect journey to explore both most fascinating wet caves and dry caves, especially Hang Tien 1 and Hang Tien 2. They are the biggest dry caves of the system with enormous entrances, large calcite formations and unusual rock features. This is your chance to experience the pristine jungle, rocky terrains, rivers, and the most beautiful campsites.

  • Astounding wet & dry caves
  • Biggest dry caves of the system
  • Jungle trekking, river crossings.
  • Traversing rocky terrains.
  • Two beautiful campsites
  • Amazing food
  • Duration: 3 day tour
  • Availability: Mid-Nov to mid-Sep
    Every Tue & Sat
  • Difficulty: Level 4 - Challenging
  • Group size: 2-10 people;
    16+ years old
  • Distance: 18km trekking; 3.5 km caving; 150m elevation gain; 10m ladder climb, 100m swimming


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


You will be picked up from your hotel in Phong Nha between 07:30 - 08:00 AM, for the an hour drive to Oxalis office in Tan Hoa, located 70 km from Phong Nha. Here you will have a tour briefing and prepare for the tour.


The trek starts with a flat path past 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 very well decorated cave. Pass though the narrow passage to the exit and 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 descended 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 La Ken Valley and your campsite.


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

You will cover a total of 8 kilometres and around 350m of 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 camp site and welcome blue lagoon. Here the underground river wells up providing a cool natural swimming pool. Relax and enjoy this after your long hike.


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. Retrace the journey back to the entrance, across the jungle through the first cave down the rocky valley and enjoy a picnic lunch. Refreshed, it’s then time for the big hill back up and down to the road for the pickup and return to the office for a welcome shower.

Transfer to Phong Nha arriving around 07:00- 07:30 PM

Adventure Level 4: Challenging

  • 2 - 3 day tour
  • Moderate trekking - very rocky terrain
  • 10-22km of trekking including 3-5km of caving
  • Total elevation gain: 200m for 2 days, 900m for 3 days
  • River crossings
  • Swimming in caves (100m)
  • 20m traverse using ropes and harnesses (Hang Va with instruction and supervision)

Frequently Asked Questions

  • 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)
  • Dry bag (for clothing and personal belongings excl. electronics)
  • Meals: picnic lunches, dinner (day 1 & 2), breakfast (day 2 & 3)
  • 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 purifier (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


  • 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 to book your tour with us.

  • This tour is operated from mid-Nov to mid-Sep (closed from Oct to mid-Nov).
  • The days in bold are still available.

You may like

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.

1 day tour

2 day tour

3 day tour

4 day tour