Yongle Dragon Hole: 987-feet-deep, world’s deepest underwater sinkhole can hold the entire Eiffel Tower!

By: | Published: March 6, 2017 11:59 AM

World's deepest underwater sinkhole called the "Yongle Dragon Hole" has been discovered by Chinese researchers in the South China Sea. It is 987-feet-deep.

It measures about 426 feet wide and is almost deep enough to hold the entire Eiffel Tower.

World’s deepest underwater sinkhole called the “Yongle Dragon Hole” has been discovered by Chinese researchers in the South China Sea. It is 987-feet-deep. When seen from above, it looks like a giant eye pupil in the sea. It is also known as the “blue hole”. According to researchers, such natural spectacle was formed tens of thousands of years ago. “Seawater filled sinkholes as a result of melting glaciers. Then, a blue hole came into being,” they say. Here are five interesting facts about it:

1) According to Xinhua News Agency, Chinese researchers have determined that the underwater sinkhole is likely the world’s deepest, reaching about 987 feet below the surface and surpassing the previous record holder, Dean’s Blue Hole near the Bahamas.

2) Researchers with the Sansha Ship Course Research Institute for Coral Protection began exploring Dragon Hole, known as Longdong, in August 2015 and completed the project last month, Xinhua reported.

3) It measures about 426 feet wide and is almost deep enough to hold the entire Eiffel Tower.

4) The research team used a Video Ray Pro 4 underwater robot to explore the sinkhole, reported CCTV News, where they discovered more than 20 species of fish and marine life near the surface.

5) Researchers told the television station that after about 330 feet, the water is oxygen free and likely unable to support life.

Watch video here:

Blue holes are essentially giant pits in the sea that can plunge hundreds of feet, and are known for the distinctive blue colours visible from above that give them the name. Dragon Hole is located in the Paracel Islands, also known as Xisha in Chinese, a disputed island group in the South China Sea claimed by China, Taiwan and Vietnam.

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