You may have seen many types of caves in your life, although you have not really seen the same as in Vietnam. Let us tell you that this is considered to be the largest cave in the world, inside which there is a different world, and inside this cave, scary sounds can be heard that people are shocked to hear.
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This cave is named Hang Son Dung, it is 9 kilometres long, 200 meters wide and 150 meters high. Also, everything from trees and plants to the forest, clouds and river is included inside this cave. This cave was opened to tourists for the first time in the year 2013. It is surprising to know that only 250-300 people are allowed to visit this year and this cave was discovered in the year 1991 by a local person named 'Ho Khanh', although at that time No one could muster the courage to go inside due to the fierce roar of water and the darkness in the cave.
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The cave was internationally recognized in 2009 when a glimpse was given to the world for the first time by a British Research Association. Later in 2010, scientists found a way to enter the cave by crossing a 200-meter-high wall, also known as the 'wall of Vietnam', and every year tourists visited the cave before August. After returning again, it is because after this the water level of the river inside the cave starts to rise. It costs about two lakh rupees per person to go inside the cave. The tourists visiting the cave , is given training for the first six months.