Chu Bluk Volcanic Cave is hidden in vast forests, wearing a magnificent unspoiled beauty for thousands of years. When referring to Dak Nong, people often think of the mountains that coincide with the message or the beautiful blue lake beds. Therefore, Chu Bluk volcanic cave is only for those who are really passionate about exploring, trekking and love to venture to new lands.


The Chu Bluk volcanic cave complex is recognized as the longest volcanic cave in Southeast Asia. Chu Bluk Volcanic Cave, also known as Bat Cave, has a length of about 25km, in Buon Choah commune, Krong Nong district, Dak Nong province, located about 20km from the center of Krong No district.

The cave extends from Dray Wax Falls to Buon Choah Cave, inside divided into more than 100 caves large and small thanks to the flow of lava millions of years ago, hidden in basalt rock. According to the researchers, the process of forming large and small caves inside took place 3,700 years ago because of volcanic eruptions.

Chu Bluk Volcanic Cave
Map of volcanic caves in Dak Nong Geological Park


  • C7 cave is the cave worth exploring the most.
  • C3 Cave 594.4 m long is the second largest cave in terms of the length of lava caves in Southeast Asia.
  • Cave C3, C4 is located in the area of Dray Sap – Gia Long waterfall cluster

This is a completely new place for the traveling people, exploring because it was only discovered in 2014. Therefore, the cave population still remains its inherent wildness. Of which:

  • C7 cave is the cave worth exploring the most. It is the longest lava cave in Southeast Asia and a prominent geological research site. The cave has a northwest-southeast direction and has a single collapse point, 11m deep, needs ropes to climb down and has a total length of 1067m. The sinkholes are a favorable environment for the characteristic vegetation growing beneath the dome to create extremely interesting natural landscapes.
  • C3 Cave 594.4 m long is the second largest cave in terms of the length of lava caves in Southeast Asia. Cave C3, C4 is located in the area of Dray Sap – Gia Long waterfall cluster, which is connected to each other with a total length of about 968m.


Inside Dak Nong volcanic cave the temperature usually remains stable at 24 degrees, so at any time you come is extremely cool. Ideal for the journey to Chu Bluk volcanic cave is the time of spring, summer, at this time the vegetation is green, sunny and less rainy, easy for you to move in and get yourself beautiful pictures. Spring is also the time in Dak Nong with many unique spring festivals, you can combine Dak Nong tourism along with a trip to explore the cave.

Chu Bluk Volcanic Cave
Chu Bluk Volcanic Cave

Since the road to The Chu Bluk volcanic cave is mainly basalt red soil, the dry season is also difficult to go, so you limit the movement here in the rainy season from May to October. In the rainy season, moving is also very difficult, inside the cave is slippery, so it is necessary to make sure to have a guide or follow a large group of people.


It is easy for you to recognize the appearance of The Chu Bluk Cave in the middle of thousands, but if you are not familiar with the road or without instructions, it will be difficult for you to access the cave. You should ask for the help of the people who work on the roadside corn, the people here are always ready to enthusiastically guide you.

Chu Bluk Volcanic Cave
C7 Cave Door

If going in the dry season, around the road will be thousands of maize fields of the people, at this time the road is still easy to go. But if unfortunately going in the rainy season, at this time the roads will be full of muddy and difficult to move, locating the cave is even more difficult.

Before reaching the beauty of The Bluk volcanic cave, you need to go through a 25km forest road along the Se – rê – pok river, to the place where there are many cave gates and tributaries. The characteristics of the cave are the round crater with a diameter of about 600m, a depth of 60m. Around the cave area there are many caves, there are caves hundreds of meters long, thousands of meters long.


Currently, this cave system has not officially exploited tourism. Some guests who want to explore must be led by experienced locals. In the cave there are many characteristic structures for the volcanic eruption process such as lava spots, recesses.

Crossing the hard basalt road, when you find the Chu Bluk volcanic cave will be a very memorable experience for visitors who are passionate about exploring. Most of the caves here are tubular, some places also have turns connected to each other in circles. Many cave mouths are tens of meters deep, it takes specialized ropes to get down.

If the outside is dry forests then inside is the strong and diverse development of vegetation. The deeper you go inside, the more you can see the difference between inside and outside the cave, this is also the place where you will clearly feel the cold of the air touching the flesh.

Chu Bluk Volcanic Cave
Inside C4 cave

The place seems to be covered with darkness, only bats reign and often receive some light but is extremely airy and cool. This place millions of years ago gave birth to lava with tremendous heat, its flow created more than 100 caves large and small. For the people of Ephesians, the volcanic cave of Chu Bluk can be understood as “You” is “mountain”, “Bluk” means “origin”.

If you look at the surface of basalt rock in the cave, you can see a strong formation from millions of years ago. Along the way in are lumpy-shaped stones spewed out by lava from the crater and the trails in the cave also create from it. This place is considered by scientists to be a rare place because of the artistic ridges on the surface of basalt rock.

Chu Bluk Volcanic Cave
Chu Bluk Volcanic Cave

Continuing to go deep into the cave, the lava rocks are scattered everywhere, under the background is the flow of red and yellow lava coiled up into ripples, on the cave wall there will be lava ridges with a very vivid shape.

The cave area with the sound of wind and the sound of water flowing in the rocky mountains makes a strange sound, challenging the traveler. It is also an interesting place to challenge yourself, ignore the fear to get up, go in search of light outside the cave.

Streams of light flow through the leafy elements with layers of dew flying lightly in the bright sun, mixed with stacked volcanic rocks covered with layers of vegetation, giving an extraordinarily magnificent natural setting.


Although there is a lot of potential, The Chu Bluk volcanic cave has not yet entered tourism exploitation. Inside the cave road is still difficult and there are some dangerous paths so you need to have local people accompany or accompany the group to avoid getting lost. Moreover, you need to be equipped with rope climbing skills to be able to conquer the cave mouth safely.

If you go in the dry season, there will not be many tall trees so you remember to prepare clothes to avoid the sun, the sun in Dak Nong is also harsh and makes you tired, affecting the process. In the afternoon, there are often sudden rains, this is a “Dak Nong specialty” so you also remember to prepare more raincoats.

If you want the trekking journey to go smoothly, do not forget to prepare yourself with solid costumes and shoes. Bring a flashlight because the inside of the cave is very dark to avoid getting lost in your way.


For more information and photos of the trip, please visit Facebook.