Son Dong Cave, situated within the province of Quang Binh in Vietnam near the Lao border, is the biggest known underground cave on the earth. It is claimed that the cave is capable of accommodate 15 large Giza pyramids, and the trough can accommodate the Boeing 747 aircraft.
Ding’s son means “Mountain River” in Vietnam. Compared to other limestone caves, this cave is comparatively young. Son Dong Cave was created 2-3 million years ago in the biggest limestone mass in Asia, colossal rock mass on the age of over 400 million years manufactured from compressed shells and skeletons of ancient sea animals.
Discovery and uniqueness of the Son Dong cave
Son Dong Cave CNN/Jarryd Salem
Two rivers, Rao Thuong and Khe, flow through cracks in limestone and slowly erosion, making a large rock tunnel, currently referred to as the Son Dong cave. The cave was unintentionally discovered by Ho Khanh, a Vietnamese local, while he hunted within the forest in 1990.
According to Howard Limbert, a British explorer, there isn’t a evidence that individuals have ever lived within the cave of their son Dong. One of the explanations is that every one access to the Cave requires almost 85 meters with special equipment. In contrast, the stone ax was present in a cave near about 5000 years, which indicates that the unavailability of the Son Dong cave could prevent exploration by prehistoric people.
Limbert explained that the Son Dong cave has many interesting things. He and his team discovered seven recent species, including fish, spiders, scorpions, shrimp, Woodlice and Plankton. All these creatures are white and haven’t any eyes in consequence of an evolutionary process that happens due to life in a everlasting black environment.
Son Dong cave ecosystem
Son Dong Cave Oxalis Adventure Tours/Ryan Deboodt
In the cave of son Dong, tourists will find underground rivers, dense forests and stunning stalactite and stalagmit formations. Some areas of the cave even let you shine with sunlight, creating dramatic and unearthly views.
A really large size of the Ding’s son’s cave helps to create clouds just in a cave from underground rivers. In winter and spring, there is a huge lake near the cave output. This lake could be very large and really deep, so guests must use a ship to cross this area to proceed their journey.
. Journal of Cave and Karst Studies The study explains that the Son Dong cave was created 1000’s of years ago and is now a house for rare species of plants and animals that cannot be found anywhere else.
However, this cave continues to be very rarely affected by people. Only just a few tourists can visit him, and even then only with a special permission and in the corporate of an expert guide from Oxalis Adventure, an official tour organizer whose Howard Limbert is a technical director together with his wife, Deb.
Tourists who wish to discover this cave can go on a 4 -day trip for $ 3,000, of which $ 660 is allocated to the Phong Nha Ke Bang National Park, where the Son Dong cave is situated.
The presence of cave networks in central Vietnam caused a serious change within the region. What once was considered one of the less developed areas in Vietnam has now turn out to be the preferred place of cave tourism on the earth and considered one of the fastest growing tourist places within the country.
Sources:
Yogi on daily basis. (2023). Discovering Hang Son Dong, the biggest 9 -kilometer cave on the earth. https://wiisata.harianjogja.com/read/2023/10/30/504/1153372/Menjelajahi-hang-dong-goa-terbesar-dunia-dengan-panjang-9-kilometer
Detikjar. (2024). Great and delightful Han Son Dong, the biggest cave on the earth. https://www.detik.com/jabar/berita/d-7624496/megah-dan-indahnya–son-dong-goa-terbesar-dunia
Radio republics Indonesia. (2025). Son of Dong, wonderful underground sky and miracles of a hidden nature. https://www.rri.co.id/wiisata/1401554/son-dong-surga-bawah-tanah-yang-megah-dan-keajaiban-alam-flunyi
