Following the Shackleton of Cave Diving | Digital Extra

0:02:13 | Clip
Robbie Schmittner is a pioneer in the world of underwater cave exploration, universally acknowledged as the world’s most dangerous activity. Robbie has spent nearly a decade charting the Yucatán’s vast network of underwater caves, known as cenotes. Along with his dive partner, he discovered the largest water-filled cave system in the world.

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