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 Phong Nha was first discovered in 1899, and then it is used for many purposes. Legend has it that Ham Nghi used this place to store treasure. And in the war against American imperialism, the Phong Nha cave was requisitioned as a field hospital, a place to hide enemy bombs and store ammunition.
In 1992, a group of British scientists together with Hanoi University conducted an expedition into the inner world with the task of discovering and documenting. Between 18 March and 18 April 1992, several expeditions were organized and successfully discovered 7.729m of caves with a maximum length of 50m and a maximum depth of 83m.
In April 1994, at the meeting with the Permanent People’s Committee of Quang Binh Province and related agencies on the explorations in the Phong Nha-Ke Bang area, Mr. Howard Limbert, the head of the expedition said: "Phong Nha cave a famous cave in Vietnam and one of the two most beautiful caves in the world. Phong Nha cave is associated with many other caves in the area. We believe the caves here can be connected by underground, and therefore Phong Nha is the longest water cave in the world. "(Vietnam-UK Landform Report, April 1994) .
Phong Nha - Ke Bang is a tourist attraction of Vietnam
Phong Nha – Ke Bang is a tourist attraction of Vietnam
After exploring the beautiful caves with impressive images, the Royal Caves have made a huge impact on International Caver magazine. From then on, Phong Nha is known as a wonderful one with seven criteria:
From these expeditions together with the documents collected, in 1995, Quang Binh Provincial People’s Committee decided to put Phong Nha cave into tourism. Since then it has become the number one tourist destination of Phong Nha-Ke Bang National Park.
Inside the Phong Nha cave
Phong Nha is the largest wetland in the world with a large underground river system. However, there are some places that are both high and large that water can not flow. There, visitors are spoiled for leisure, comfortable to admire the magnificence of stalactites that nature created with all the magic. This cave is divided into three parts, each of which is home to many different animals and has a large difference in temperature.
Entrance Area
The first few meters inside the cave are called the entrance area. This is the home of all the animals living in the sun, near the edge of the gate. Every animal living in a national park can do the same: birds, monkeys, fish, insects and many other species.
This is where the artificial lighting system, known as the twilight zone, where light and darkness form together, forms a mirage There are not many animals in this area as there are many visitors every day. If present, it is mainly found in water such as crab, shrimp, eel, and various fish species.
Dark Zone
After the last electric light system in the area of ​​1.200m from the cave there is not much left besides the dark. Here, the dynamic experience is dark and the wind hits the cliff. The deeper into the shadow, the more exotic animals are, the more animals that live inside the cave without light like fish, bats, insects. The insects can survive and pass the dark easily. Occasionally, red lizards can be found in the shadows but the chance to meet them is quite difficult.
Cave preservation
There are many ways to destroy caves that tourists have been accidentally creating, the first reason is that most visitors are curious to try to touch stalactites. You may think that this is justified, but it is true. When a person touches one of these stalks, the oil from the skin will stick to the emulsion and the water will flow through the oil instead of sticking to form a new emulsion. You can imagine how hundreds of people touch each year will create a noticeable effect.
The second reason is the change in the amount of carbon dioxide in the air. The more people enter, the more balanced the balance. This will affect the general temperature in the heart.

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