Reasons why Son Doong Cave is a great wonder in your travel bucket list

As the largest cave in the world, Son Doong brings so many interesting and attractive experiences that everyone wishes to explore at least one time in life.


Son Doong is located in Phong Nha-Ke Bang National Park, about 500km to the South of Hanoi. It was first discovered in 1991 by a local named Ho Khanh, followed by a team of British cavers lead by Howard Limbert in 2009.

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Massive size

Photo: Oxalisadventure

There are various ways to determine the size of a cave, but the most common way is measuring the cross-section of the largest cavity. By this measure, Son Doong is currently the largest cave in the world. The largest chambers of the cave are up to 200 meters high and 150 meters wide, higher than the Great Pyramid of Giza in Egypt. The world’s second-largest cave is the Deer cave in Malaysia, the third is En cave which is not far from Son Doong.

Lake and Underground River

Photo: Oxalisadventure

In winter and spring, there is a gigantic lake near the exit of Son Doong cave. The lake is so large and deep that visitors have no choice but use boats to cross this area.

Cave collapses

Photo: Oxalisadventure

Son Doong cave is up to 9 km long but is rarely pitch black thanks to two giant collapses like “skylights” that provide lights for the cave, creating magnificent scenery.

Forests inside the cave

Photo: Oxalisadventure

Lights bring life; so, underneath the large holes in the ceiling lie unique thick forests. The climate and environment in Son Doong cave are different from that of the outside, hence the flora species here also cannot be found in the surrounding forests.

Prehistoric stalagmites

Photo: Oxalisadventure

Son Doong cave owns many beautiful and magnificent stalactites which are formed millions of years ago. Stalagmites form exotic and mesmerizing shapes. Some are even taller than the Arc de Triomphe in Paris, France.

“One-of-a-kind” campsite

Photo: Oxalisadventure

The two campsites in Son Doong cave are undoubtedly one of the most beautiful and unique in the world. Both are located at the edge of the cave collapses where tourists can admire the star-lit sky on clear evenings.

Fauna species

Those who have the chance to explore Son Doong Cave said that this place possesses an extremely rich and unique ecosystem. Visitors can see from small creatures, insects to cave and forest wildlife, such as monkeys, bats, and blind fish.

Visitors can come across from small creatures, insects to wildlife animals such as monkeys, bats, and blind fish.

Vietnam’s wall

Photo: Oxalisadventure

Right in front of the cave, there is a 90m-high stone wall, called “Vietnam’s Wall” by explorers. This site is one of the most difficult challenges in the expedition of Son Doong cave. Visitors have to conquer the wall with the help of ladders, ropes, and technicians.

Experience to swim in the cave

Photo: Oxalisadventure

With a series of underground rivers and lakes, swimming in Son Doong cave is both a must and an opportunity for visitors to enjoy interesting experiences. The water in the cave is constantly drained, so it is very clean and cool, but in some areas, the flow is quite fast, so visitors must follow the guidance of the tour guides.

Hunting for sunshine and clouds

Photo: Oxalisadventure

The sunbeams and mist have created a “brand” for Son Doong cave. If you want to contemplate them, you should come here in spring, as the sun shines penetrate cave collapses. The mist also adds to the already magic and stunning landscape in the cave.