A hole in the cave is just too common and most of us would have give a fleeting glance as we travel through various regions of the world. However, a cave in the jungle of Vietnam which was discovered by a Vietnamese farmer and later named San Doong Cave may look ordinary to a viewer outside but when it was explored by a team of Briton, it was discovered to be one of the largest cave formation in the world according to Newsner.
Inside of the hollow can fit in a 40 foot skyscraper with a self-sustaining jungle and river system. It is a world onto itself with jaw dropping rocks formations. The view is majestic with many natural formations carved by million of years of rainwater fluvial and many beautiful flora and fauna not seen before by human.
The length of the cave runs 87 miles long, longer than any man made tunnel system. The photographs below was taken inside the cave.