World's largest cave Hang Son Doong reveals jungles and hidden river in Vietnam

Hang Son Doong, located in Vietnam's Phong Nha-Ke Bang National Park, is the world's largest cave. It measures over three miles long and 660 feet high, with enough space for a Boeing 747 to fly inside. The cave features two jungles and unique skylights. Discovered in 1990 by local resident Ho Khanh, the cave was fully explored in 2009 by a team from the British Cave Research Association. Recent findings include an underwater tunnel that increased the cave's volume significantly, highlighting its vastness. Son Doong contains remarkable geological formations, including one of the tallest stalagmites in the world. Its ecosystem supports diverse life, with fossil passages revealing the area's ancient marine history. The cave's unique features continue to attract researchers and visitors.