While locals have known about the sinkholes for centuries, it was only "discovered" by the outside world in 1994, when British explorers attempted to survey its maze-like underground cave system.

Chinese Speleologists announced what could be the world's largest sinkhole, with a diameter of almost 500 ft and 387 ft deep, 1,476 ft if measured from the land surface to the bottom.

It is also 662 meters from top to bottom, making it the world's largest and deepest sinkhole. The sinkhole is a doubly nested structure — with upper and lower bowls measuring 320 meters and 342 ...

The world’s biggest sinkhole formed over millennia, as salts in the soil eroded the rock into sand, which was then blown away by the fierce Saharan winds.

The Xiaozhai Tiankeng, often called the “Heavenly Pit,” stands as the planet’s largest and deepest known sinkhole. This extraordinary geological formation located in southwestern China has ...

The 49 sinkholes are clustered in a 230-square-mile patch of land within the 2,000 square miles that were surveyed. The largest of the sinkholes has a diameter of 1,706 feet and a depth of 1,050 feet.

The geopark has the largest sinkhole cluster in the world, and covers an area of 930 square kilometers. There are two underground stream systems in the park. The karst mountains, ...

About 20 percent of the world's landmass is made of karst landscapes, with China boasting the largest sinkhole in the world. Discovered in 1994, ...

From China's Heavenly Pit, which stretches down 2,172 feet, to the Devil's Sinkhole in Texas that is home to three million bats — here are some of the world's deepest known sinkholes.

Belize Great Blue Hole: World's Biggest Ocean Sinkhole Has Plastic at Bottom. Published Jan 22, 2019 at 7:30 AM EST Updated Jan 22, 2019 at 1:07 PM EST. By .