Forest In Hang Son Doong Cave
The name of the cave is Hang Son Doong. It is situated in Vietnam and known as the largest cave in th world. Since, 1991 the cave was hidden inside the forest, then a local farmer discovered the cave. Due to the wide open of cave made roaring and whistling sound. Hence, the farmer also did not get in because, it is too steep. Also the stream flowing outside the cave has stopped the people to think off the cave. Even though after its discovery, it became world popular by the British Cave Research Association in the year of 2009. But, now a company taking people tour inside it.
The cave is 5 miles long inside with a river and waterfalls. The cave can fit a 40 storey building inside it. The rarest cave pearls are seen here and many algae due to inhabitance. There is a calcite wall inside the cave which is 70 meters and highest in the world. Hence, The wall is also known as great wall of Vietnam. The cave is open from February to August, then the rain wont permit to go inside Son doong cave. Fortunately, we got some photographs taken inside the cave by John Spies, a photographer in 500px.