किसान को लगा ये है गड्ढा लेकिन पास जाके देखा तो होश उड़ गए...

This is not a cave but a different world. In this cave 5 kilometers long, there are forests, rivers, pillars, and not only crores of years old fossil. This is the world's longest cave.
In Vietnam, the phone is in Nha-Ke Baag National Park, the world's largest cave, hang Son Dung. It was discovered by a farmer. There is a different world in this cave of 5 km. In which monkeys, birds and bats are found, many green rivers flow. Here are the world's tallest limestone natural pillars. Within the cave, millions of years old fossils meet. This cave has its own environment, where clouds also fly
Until 1990 no one knew about it that even a unique world that is so huge, grand and mysteries in the park is hidden. Ho Kahh, a farmer, came from a childhood to come to collect timber and other things in the forest.
While working, he saw the open part of a limestone rock. He saw the clouds floating at the mouth of the cave. The sound of the river flowing out of the river came from him somewhere. Not only did he feel the strong wind coming out of the cave. After that he did not go inside the cave, and returned home.
Meanwhile, two members of the British Chevroor Research Association, Howard and Deb Limbert, came to call Naha-Ke Baag National Park in search of caves. The farmer told the researchers about that cave. Ho Khánh reached with him in that area, but later he could not find that cave.
Cave once again appeared in 2008 Recalling the way to reach there, recorded it. In 2009, the researchers entered the cave for the first time. It was later renamed Hang Son Dung, which means the cave of the hill river.
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