The cave, located in the separatist region of Abkhazia ... Four weeks later…We’d barely returned home before a new team from our Call of the Abyss project set out to surpass the record ...

saw it was rising from an abyss more than 330 feet (100 m) deep, Audy said. The researchers descended into the pit and found an extensive system of caves, including some with thermal springs and ...

Now, three years after the initial discovery, a second expedition into the cave system has found that not only is the abyss filled with hot water, but it’s the largest underground thermal lake ...

Researchers were able to confirm their findings four years after they first made the groundbreaking discovery.