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World biggest ocean blue hole named Sansha Yongle

(chinadaily.com.cn) Updated: 2016-07-25 12:51 Comments

World biggest ocean blue hole named Sansha Yongle

World's biggest ocean blue hole has been named Sansha Yongle. [Photo/chinanews.com]

Located around the Yongle atoll of the Xisha Islands, the world's biggest ocean blue hole was named as "Sansha Yongle Blue Hole" by China's Sansha municipal government.

The blue hole is a vertical cave of 300.89 meters' depth, with its entrance diameter reaching 130 meters and its bottom's diameter stretching 36 meters. So far, no connections between the hole and the outside sea waters have been found and the water inside the cave does not flow.

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