Here's Part II of GoPro's amazing video series "Searching the Mayan Underworld".
In this episode, "Just Breathe," the team scrambles to save fellow diver Jeanna Edgerton, who struggles for air when her equipment unexpectedly malfunctions.
Deon Dreyer's dead body had been in the bottom of Bushman's Hole, one of the world's largest freshwater caves in South Africa, before renowned cave diver Dave Shaw discovered it by accident. Shaw then took an almost unimaginable risk to recover it.
Last month GoPro posted a 3-part video series "Searching the Maya Underworld," documenting the explorations of two cave divers on a mission to discover the world's biggest cave.
Here is Part 1- "Place of Fear"