Let’s explore this destination with Vietluxtour - Vietnam tour operator

Thong Valley, another name for Hang Hung Thoong is located deep within the Phong Nha - Ke Bang National Park's heavily protected subdivision system and surrounded by million-year-old limestone mountains and forests, Hung Thoong can only be reached by traversing the winding paths of the wilderness. This cave system stands apart from those previously explored, and these caverns may only be reached by hiking via the woodland paths.

Hung Thoong Cave
Hung Thoon Cave - abstract landscape (source collected)

Discovering Hung Thoong Cave, visitors will experience many different types of terrain, from trekking in the middle of the jungle, swimming through underground caves, to wriggling in dry caves, swinging over cliffs, and camping among the thousands of Phong Nha - Ke Bang. Enjoy the feeling of soaking in the cool streams, or watch the beautiful jade green lakes from the unique to the surreal.

Now let discover Hung Thoong cave

At the outset of this expedition, travelers will encounter Hung Cave. Viewed from below, it resembles an immense square adorned with million-year-old stalactites that form a captivating curtain. To reach Tron Cave, one must navigate a forest filled with treacherous, slippery slopes. Within this cave lies a 1.2-kilometer emerald lake, which visitors must swim or paddleboard across to continue their odyssey.

Hung Thoong Cave explore

Hung Cave is a place where many ancient stalactites with exquisite hues and patterns may be seen inside the vast, deep caverns. Additionally, a system of crystal-like straws with a drop of water at the end of each emulsion tube was found in the Hung cave. Hung Cave is one of the most stunning locations you will find in Hung Thoong. To reach here, you must cross three limestone mountains on rough, perilous paths with the assistance of locals. You'll realize that all of the work was worthwhile as soon as you enter the cave. A vast, amazing area with the beauty of individual, multicolored stalactites opens itself in front of you. When viewed from below, the stalactites in Hung Cave resemble curtains formed of stone and make the surroundings appear more imaginative and magnificent.

Hung Thoong Cave
Hung Cave is a place where many ancient stalactites with exquisite hues and patterns may be seen inside the vast, deep caverns
(Source: collectd)

Tron cave

Tron Cave or Round Cave is the next location after Hung Cave that you may visit. This name was given because of a circular mouth that resembles a mystical gate leading to the Garden of Eden. There is a lagoon about 1.2 kilometers long deep inside the cave where you may swim or SUP. You will be overcome by the majesty and lyrical beauty of nature as you stand on a paddle board, leisurely drift on the jade-green water, and see the stalactites in the long, deep cave. Deep inside the cave will be an underground lake, in Tron cave is a blue lake, about 1km long. Here, guests can experience swimming at the lake or relaxing SUP boat rides. Swinging, climbing over cliffs, or camping are also interesting experiences when visiting Hung Thoong.

Hung Thoong - tron Cave

Thung cave

You will find Thung Cave after passing through Tron and Hung caves. To reach here, you must first cross a forest, wade through streams, and then swim through an 80-meter-long lake. To enter the deepest part of the cave, you must first swing the cliff-climbing rope and then swim through a different little lake. The explorer has to have a good level of stamina because the journey is fairly lengthy and challenging.

Thung cave

You will encounter a sinkhole that is 30 meters high while swimming in the tiny lake. It is unusual for a location to have direct outside light. Consequently, the vegetation here is exceptionally luxuriant. The sinkhole is illuminated by the light from above, turning the entire region a bright yellow and making it dangerous for anybody to enter.

Hung Thoong Stream

Many visitors to the Hung Thoong Discovery trip love visiting this location.

Hung Thoong Sinkhole

Another special feature of Hung Thoong is the sinkhole and mountain lake. If there are 2 sinkholes in Son Doong, this number is only 1 in Hung Thoong. A sinkhole is a hole caused by the subsidence of soil and rock on the surface when the soil below is gradually hollowed out to the point where there is no longer enough connection to support the rocks above. As a phenomenon that comes from nature and is somewhat dangerous due to its unique topographic structure, admiring a sinkhole is still the dream of many tourists as well as natural beauty enthusiasts. Hung Thoong’s sinkhole is called Nightmare with a depth of 250m.

Ma Da Lake

Ma Da Lake is now one of the most stunning locations in Phong Nha-Ke Bang's natural heritage that visitors to the area desire to discover.

Mada lake