With 365 unique diving sites, there are plenty of things for adventurers to see. It will take multiple trips to just visit even the most popular of destinations, but there is a lot more to offer ...

[Related: See the strange new species discovered near Chile—with the help of a deep-diving sea robot.] Prior to these expeditions, 1,019 species were known to live in this part of the Pacific Ocean.

J ust off South Korea’s southern coast lies Jeju Island, home to a community of women divers known as Haenyeo, or “women of the sea.” These women are trained at a young age in free diving into the ...