Some of the world’s most intrepid cave divers have begun an expedition to explore a subterranean world that’s remained hidden for more than 50 years. Ultimately, they’re doing it for you.
Robert Osborne
In 10 days, some of the world’s most intrepid cave divers will mount an expedition to penetrate a subterranean world that’s remained hidden for more than 50 years. Ultimately, they’re doing it for you.