The cave, called Sơn Đoòng, stunned researchers with chambers that were wider than airplane hangars and skylights that ...
Imagine the surprise of young lumberjack, Ho Khanh, a native of Vietnam's then-sleepy Phong Nha township, when he saw enormous, ethereal columns of fog billowing out of the ground, like the earth ...
Highlights of the five-night trip include seeing the cave’s own rainforest and a calcite wall called the Great Wall of Vietnam. Vietnam is home to the world's largest cave. It's so vast that it has ...