article_snippet: The colossal underground network of tunnels was discovered in 2009 and officially named the world's largest cave.
article_snippet: the world's largest cave was first discovered in 1991 by a local farmer and is five times the size of Malaysia's Deer Cave .
article_snippet: the world's largest cave means 'mountain river cave'.
article_snippet: the world's largest cave was created 2-5 million years ago by river water eroding away the limestone underneath the mountain Where the limestone was weak, the ceiling collapsed creating huge skylights.
article_snippet: the original video is estimated that the world's largest cave was created around two-five million years ago by river water eroding limestone underneath a mountain .