A group of five Italian scuba divers died while exploring a deep underwater cave near Vaavu Atoll. No one knows what happened ...

Instead, there are two caves that alternate as the record holders for the deepest cave on our planet: Veryovkina and Krubera-Voronya ( ...

A remotely operated vehicle exploring a dark limestone cave 385 meters beneath the ocean surface near a remote Japanese island captured a flash of brilliant green light when its mechanical arm brushed ...

The light fades as divers disappear farther into a cave system, until the greenish hue from their flashlight is all that’s visible, bouncing off walls, picking out creatures humans might never have ...

In fact, here are 19 wondrous caves in the U.S. that, in our opinion, are must-sees for any traveler or adventure-seeker.

The group had been diving in ⁠caves in the Vaavu Atoll at a depth ⁠of around 50m (165ft). They were reported missing by the ...

A team of expert Finnish cave divers believes they may have uncovered what led to the deaths of five experienced ...