aka the Dragon Hole, in the South China Sea, which measures 990 feet to the bottom. Known in scientific circles as Karst formations, blue holes are actually vertical marine caves that were carved ...

Chinese researchers discovered what they say is the deepest blue hole in the world, off the disputed Paracel Islands in the South China Sea. The sinkhole was measured at 1,000 feet, deeper than ...

This makes it 393 feet deeper than the Sansha Yongle Blue Hole, or Dragon Hole, in the South China Sea, which is 987 feet deep and the previous record-holding blue hole. In December, researchers ...

Good news, China claims they've discovered the world's largest hole. With territorial claims by Vietnam, Malaysia, Indonesia, Brunei, the Philippines, Taiwan, and China, the South China Sea ...