Diver Craig Challan descended to a depth of 194 meters or roughly 636 feet, as he cautiously made his way along the submerged cavern. That depth marked a record, but still didn’t finish the exploration of the cave, nor did it lead to the discovery of the river’s source. But it did show that explorers can go to even greater depths than previously thought possible.
Sweet Jesus, my ears are popping just reading about this. Full story via Gadling.com.