Guizhou cave world's third longest

GUIYANG — A survey of Shuanghe Cave in Southwest China's Guizhou province, has found it to be much longer than previously thought, making it the third longest cave in the world, researchers said.

The latest research results, released on Tuesday, showed the cave to be 409.9 kilometers long and 912 meters deep.

Previously, the cave was surveyed at 257.4 km long and 665 meters deep, based on an international scientific investigation carried out before 2019.