As far as we know, this particularly mysterious cave is in the national park, 500 kilometers south of Hanoi, the capital of Vietnam. It is the largest karst terrain in the world. There are more than 300 rare natural caves here, which have been rated as world natural heritage. There is also a mysterious cave hidden in these natural caves. It is a particularly large single natural cave and the largest cave passage in the world so far. The name of this cave is Han Song Dong. At that time, when the farmer was catching prey, he accidentally entered the cave because of rain.
He found that this cave looks ordinary, but after entering it, it is another world. However, due to the dim light, he could not explore deeply. When people entered this place, they found a big rock wall blocking the way. People were shocked by what they saw. There is a forest river in this cave, which is very big, 200 meters high and 8000 meters long.
Entering this place, people will have a particularly intuitive feeling and feel that they are particularly small. This cave is like a paradise, especially beautiful, quiet and mysterious.