The Xiaozhai Tiankeng stands as the textbook example of what happens when karst processes are given perfect working ...

The Xiaozhai Tiankeng, often called the “Heavenly Pit,” stands as the planet’s largest and deepest known sinkhole. This ...

The Xiaozhai Tiankeng sinkhole is vast. Probably formed centuries ago by collapsing caves and underground rivers, teams of explorers have sought to understand its many mysteries for years.

Our journey into the world of inky black cavities takes in the world's largest sinkhole - Xiaozhai Tiankeng, or Heavenly Pit - a monster in China that at one point reaches 2,172 feet into the earth.

China's southwestern karst landscape is pockmarked with dozens of enormous sinkholes that look like they were made with a cookie cutter — and scientists keep finding new ones. When you purchase ...

But one thing is for certain: measuring 660m deep, with a volume of 130 million cubic metres, China's Xiaoxhai Tiankeng is both the deepest and largest sinkhole in the world. Video: The world's ...