Watch: UK-China expedition discovers world-class cave hall
A China-UK joint expedition team has discovered a world-class giant cave hall in the Nongle sinkhole in Fengshan County of south China’s Guangxi Zhuang Autonomous Region
The size of the cave-hall is about 6.7 million cubic meters and the Nongle sinkhole is about 200 meters long, 100 meters wide and 118 meters deep. The bottom of the sinkhole is a huge cave due to collapses.
Euronews
https://www.euronews.com/2018/10/20/watch-uk-china-expedition-discovers-world-class-cave-hall