Vietnam’s Son Doong is the world’s largest cave passage, with a volume of about 38.5 million cubic meters and sections reaching 200 meters high and 150 meters wide, large enough that a 40-story skyscraper could stand inside it

Sunlight falls through a collapsed ceiling and lands on a forest of trees more than 40 metres tall, growing on a floor that no daylight would otherwise reach. Above them, clouds form and drift along the cave roof. Below, a river runs through the dark. This is the inside of Hang Son Doong, in central [...] The post Vietnam’s Son Doong is the world’s largest cave passage, with a volume of about 38.5 million cubic meters and sections reaching 200 meters high and 150 meters wide, large enough that a