219K views · 1.3K reactions | What's big, blue, and 300 metres deep? It's the world's largest sinkhole, and it's just been discovered in the South China Sea | Sky News | Facebook

39K views · 1.3K reactions | Water sinkhole are dangerous  | Davis Facts | Facebook

29K views · 861 reactions | Chinese scientists discovered a cluster of 54 giant karst sinkholes, known as “tian keng” in Chinese, within an area of 5,000 square kilometers in northwest China's Shaanxi Province. They are believed to be among the largest karst sinkhole clusters in the world. The researchers have also found around the sinkholes a dozen species of wildlife and plants and rare species listed as vulnerable. | CGTN | Facebook