Son Doong cave belongs to Phong Nha – Ke Bang Cave complex (Son Trach, Bo Trach, Quang Binh). With the perfect images that the press has published, surely Son Doong will be extremely attractive to those who love to conquer and explore. However, entering Son Doong cave is not easy, you must have the Son Doong cave travel experience that we will introduce through the following article.
Introduction to Son Doong Cave
Overview
Located in Phong Nha – Ke Bang National Park, Bo Trach District, Quang Binh Province, Son Doong Cave lies within the oldest limestone mountain range in Asia, dating back 400–450 million years. Using advanced fossil sediment analysis, geologists have determined that Son Doong Cave was formed 3–4 million years ago.
Nestled in a fault zone of the majestic Truong Son Mountain Range, the cave was gradually carved out by the Rao Thuong River, creating a massive underground tunnel hidden beneath dense limestone mountains. Over time, parts of the cave’s ceiling collapsed, forming gigantic skylights that open up to the outside world.
Formation History & World Records
On December 10, 1990, a local farmer named Ho Khanh first discovered the cave while trekking through the forest but lost track of its location. After multiple attempts to rediscover it, and with the assistance of British cave experts, the cave was finally re-explored in 2009 and officially declared the largest natural cave in the world by the Vietnam-British cave exploration team.
With an estimated volume of 28.5 million cubic meters, length of 9 km, width over 150 m, and height exceeding 200 m, along with a network of more than 350 connecting caves, underground rivers, and lakes, Son Doong Cave is a true natural wonder. In 2013, Guinness World Records officially recognized Son Doong as the world’s largest cave.
Essential Things to Know Before Exploring Son Doong Cave
The only way to visit Son Doong Cave, often called the “paradise on Earth,” is by booking a guided expedition with Oxalis Adventure. This is the sole tour operator licensed by the Quang Binh Provincial Government to conduct limited adventure tours inside Son Doong Cave.
Best Time to Visit Son Doong Cave
The Son Doong expedition is influenced not only by the weather in Phong Nha – Ke Bang National Park but also by the unique microclimate inside the cave. For safety and optimal conditions, Oxalis Adventure operates tours only from January to August, with an average of 13–15 tours per month, limited to 10 participants per tour.
Tour Information
This challenging expedition includes:
- 17 km of jungle trekking
- 8 km of cave exploration in Quang Binh’s cave system
- 800 m of steep climbs
- 90 m vertical rope ascents
Due to the demanding nature of the journey, participants are advised to start physical training at least 6 months prior to the trip.
The tour cost is $3,000 per person, and detailed benefits can be found on the official Oxalis Adventure website.
How to Get to Phong Nha
You can fly into nearby international airports such as Da Nang or Hue, then continue your journey to Phong Nha by train, private car, or bus.
For the fastest and most comfortable transfer, you can book a private car service Danang To Phong Nha from DanangPrivateCar.com.
Son Doong travel experience – prepare physically
When you book a tour, medical professionals will ask questions about your health, so you must answer honestly. Because that is the guarantee of your safety during the trip.
Questions your healthcare professional may ask you are:
- Do you have or have a history of cardiovascular disease?
- Do you have asthma, epilepsy, or depression?
- Are you taking any medications?
- Do you have any problems with joints, legs, back?
- What sports do you usually play?
Besides, before traveling to Son Doong, you need to practice walking 10km in 1 day, crossing at least one hill 200-300cm high. Walk firmly on rough ground and climb over large rocks. You should do this exercise 3 to 6 months before traveling to Son Doong.
If you are in big cities, you can do this exercise by climbing stairs 3 floors at a time, without panting, without rest and doing about 15 times a day. Not only that, the experts will introduce and practice for you the necessary skills when going to the jungle before starting the trip about 2 days.
Son Doong cave tour
The car of the travel company will take you to kilometer 39, Ho Chi Minh road, West branch. From here, you will gradually walk down the Doong valley . Then go through the village of the Van Kieu ethnic group. In the village, there are only eight households with 21 people. Here you will be in charge of the delegation, hammock rest for lunch and meals. And continue to follow Rao Thuong stream to enter En cave. At this time, it has begun to get dark, so we will stay in En cave to eat and stay overnight. During this time, the people in charge, the tour guide will tell you stories about the cave, about the legend… For you to understand more about the culture in this place.
In the morning, you are arranged to have breakfast and prepare for the most interesting experience of your life, which is Exploring Son Doong Cave. You will have the opportunity to explore the cave in a period of 5 days and 4 nights.
As you gradually go into the cave, you will see tall stalactites, a primeval forest with no trace of humans. It is a vegetation with a variety of precious plants and trees. And the special thing is that the fog is always covered, creating a separate climate, separate from the outside.
You continue to pass about 50km through the jungle and past the high stalactites in the cave, to explore deeper inside the cave. Entering the cave, you will be able to see with your own eyes the magnificence that the Creator has bestowed on this place. Fossil corridors appear here, proving that life existed in caves millions of years ago.
And Son Doong also owns stalagmite columns nearly 70m high.
Or the large jade stones that people call “cave pearls”, the chemical composition of these rhinestones is determined to be calcite.
Inside the cave you also see an underground river flowing through, with a length of about 2.5km.
Here, you can see coral ruins and fossil animal skeletons. There are many faults on the ceiling of the cave, creating skylights, bringing sunlight into the cave. Create conditions for the vegetation in the cave to grow.
According to geologists, Son Doong cave was formed about 2-5 million years ago. Its size is equivalent to the capacity of about 68 Boeing 777 aircraft. With such size, Son Doong cave has become the largest natural cave in the world.
What to Prepare Before Your Son Doong Cave Expedition
Physical Training and Health Requirements
Exploring Son Doong Cave requires excellent physical fitness to handle the real challenges of cave trekking. If you join the tour but fail to meet the necessary health and fitness conditions to complete the expedition, you will be escorted back to the starting point without a refund.
To prepare, you should:
- Walk at least 10 km per day
- Climb 3 floors per session, completing 15 climbs per day without heavy breathing
Essential Items to Pack
Oxalis Adventure will provide all necessary camping equipment, so you only need to bring the following (maximum 7 kg):
Clothing
- 1–2 sets of short-sleeve shirts and pants for relaxing and camping
- 4–5 sets of sportswear suitable for adventure trekking
- 1 swimsuit for visiting En Cave
- 1 lightweight windbreaker and 1 warm sweater if traveling between February and April
Footwear
- 1 pair of hiking shoes with good grip and a simple design to avoid snagging on branches
- 1 pair of rubber sandals or strapped camp shoes for use at the campsite
Backpacks
- 1 large waterproof backpack with multiple compartments for personal belongings (carried separately by porters)
- 1 small daypack for essential items needed during the trek
Medications
- Basic first aid knowledge is recommended
- Bring stomach medicine, digestive aids, cold medicine, insect repellent, electrolyte supplements, and antifungal foot powder
Personal Items
- Underwear, shampoo, body wash, toothpaste, face wash, towels, dry tissues, wet wipes, sunscreen, gloves, sun hat, makeup remover,
- 4–5 pairs of long, thick socks (avoid waterproof or short socks)
Other Essentials
- Camera, smartphone, power bank, waterproof bag, tripod, flashlight, personal water bottle, sleeping bag liner, earplugs,
- Headscarf to wear under the helmet to reduce odor and sweat buildup
Additional Tips for Exploring Son Doong Cave
- Avoid touching any stalactites, rock formations, insects, plants, or wildlife inside the cave to protect its pristine ecosystem.
- Stick to the designated narrow trails and follow the expedition leader’s instructions for safety.
- Prepare all essential camping gear and personal items in advance, as these supplies are not readily available for purchase in Phong Nha.
In addition to exploring Son Doong, you can also explore more caves in Phong Nha – Ke Bang National Park in Quang Binh . Please leave questions or contributions to Danang Private Car in the comment section!
