Son Doong Cave
In 1991, heavy rains fell and farmer Ho Khanh was looking for a place to hide until he found himself in this place.
It is Han Son Doong Cave in Vietnam, whose name means “Mountain River Cave.”
It is located in Phong Nha Co Bang National Park within Quang Binh Province in Vietnam near the border with Laos.
"Mountain River Cave", which is the largest natural cave in the world, and after this incident with the farmer, the cave remained unknown for 15 years until 2006 AD, when the Research Society visited that area, so the farmer told them about that cave and led them to it, but he forgot the entrance and its exact location, even between... In 2009 AD and 2010 AD, when the same farmer found it and told the authorities about it, the cave became a well-known and internationally famous landmark...
The age of this cave is between 2 and 5 million years, and its length is more than 5 kilometers, and it can accommodate 68 Boeing 777 aircraft and more. Its width is 91.44 meters and its height is 243.84 meters, enough for a building consisting of 40 floors, and it is so huge that it has its own climate. So much so that clouds form inside it.. Many described it as an extraterrestrial planet, and experts called it “The Garden of Eden..
By mid-2019, it became clear that the cave was connected to a river called Hang Thong. This increases the actual volume of the cave by more than 1.6 million cubic metres. The cave contains some of the longest known cave stalagmites in the world, reaching 70 meters in length, behind the Great Wall of Vietnam. Cave pearls the size of baseballs have also been found, and are considered large.
In early August 2013, the first tour group explored the cave through a guided tour. After the cave became famous, entering it required a permit. Tours are provided on a limited basis, with only 1,000 permits being provided for the 2019 and 2020 seasons. Tours are being extended. From February to August, because after this period heavy rains cause river levels to rise, making entering the cave largely impossible. As of 2017, Oxalis Adventure Tours is the sole sponsor and authorized to enter the cave for tourism purposes only. As part of the development plans for this cave, consideration is being given to building a 10.5 km (6.5 mi) cable car across the cave, at a cost of between 112 and 211 million dollars, while environmentalists oppose this project.
Source: websites