
Blue Hole dispatches: In December, the Blue Hole Belize 2018 Expedition took submersibles -- including an Aquatica Stingray 500 -- to the bottom of the hole to see what lies beneath. Now they're back with their findings.

Team of experts: The team includes Fabien Cousteau, an underwater explorer -- plus Richard Branson, Virgin billionaire (center) and a team of scientists, explorers and filmmakers from the Aquatica Foundation. CNN Travel spoke to Aquatica Submarines' Erika Bergman, chief pilot, oceanographer and operations manager (second from left) about the experience.

Newly discovered stalactites: Bergman says the team was able to discover never-before-seen stalactites (a type of mineral formations shaped like icicles) roughly 407 feet into the hole -- right at the very bottom of the 410-foot hole. "That was pretty exciting, because they haven't been mapped there before, they haven't been discovered there before," she says.

Heading below: Bergman says it's incredibly fascinating to be at the bottom of the hole. "One of the crazy things about the hole is the hydrogen sulfide layer," says Bergman.

Completely black: "You lose all of that Caribbean sunlight and it just turns completely black and it's totally anoxic down there with absolutely no life," explains Bergman.

Plastic-free: The team was also pleased to see the Blue Hole was surprisingly free from trash. "There were basically two or three little pieces of plastic -- and other than that, it was really, really clear," says Bergman.

Unidentifiable elements: The team eerily found some unidentifiable tracks at the bottom of the hole, that remain, says Bergman, "open to interpretation."

Live broadcast: Broadcasting live from the very bottom turned out to be tricky, but the team still brought those interested along for the ride and filmed updates from the ship at the surface, broadcast on the Discovery Channel.


