Han Song Dong, located in Viet Nam's Fengya List National Park, has a cross-sectional area of 262×262 feet (about 80×80 meters) in most areas. Han Song Cave was discovered in a remote jungle in Vietnam. Many scientists believe that Han Song Cave is by far the largest single large-scale natural cave in the world, and it is also the largest cave passage in the world.
Han Song Dong, also known as Shanshui Cave, has the meaning of "mountains and rivers", which is named after the formation of the cave originated from limestone eroded by rivers at the foot of the mountain millions of years ago.
The "Han Song Cave" hidden deep in the Vietnamese jungle consists of more than 150 underground caves.
It's not easy to travel to the caves in Han Song. It will take a day and a half just to get to the cave. During this period, you must go through a wooded and inaccessible virgin forest.
Traveling to Hansongdong is relatively expensive, and it costs about $3,000 (about RMB 6,543,800+8,000).
Han Song Dong is 9 kilometers long. The largest cave is 5 kilometers long, 200 meters high and 150 meters wide, completely beating the previous world record holder-Deer Cave in Borneo, Malaysia.
Han is big enough to accommodate a Boeing 747. The water in the cave is swift and the vegetation is lush.
Although Han Song Dong has a long history, it was not known to the world until a group of British scientists conducted research here in 2008.
The underground water in the cave is fierce, and the sound of the river flowing can be heard at the entrance. The noise is very loud, giving people a sense of fear that even the locals dare not approach.
The river extends inward from the mouth of the cave and is 2.5 kilometers long.
In the huge cave, the huge stalagmites are rugged and 70 meters long, hanging upside down from the air, which is amazing.
The cave is rich in species, and poisonous centipedes grow all year round.
Wild monkeys, snails and other creatures can also be seen everywhere.
Hansongdong has a superior natural environment and a remote location, and its original ecology has been well preserved for many years.