Vietnam: Phong Nha-KẻBàng National Park
Underneath Vietnam: Discovering an underground world By Jamie Leigh In 2009, British and Vietnamese explorers discovered Sơn Đoòng Cave – the largest cave in the world. An entrance to the cave system, whose name means “Mountain River Cave” in Vietnamese, was initially found in 1991 by local farmer Hồ-Khanh. Lost…