but the underwater sections are simply breathtaking. Located on New Zealand's North Island, these caves are famous for their glowworms that light up the dark tunnels like stars in the night sky.

The underwater caves of the Yucatán Peninsula ... these animals had to venture down dark, dry cave passages to reach drinking water, sometimes surprisingly far away from an entrance.

One of the world's deepest and most dangerous caves lies in Abkhazia, a disputed part of Georgia. It takes days to get to the ...

Take a deep breath and dive below the surface with cave-diving experts and scientists in the video above. Find out what it takes to plunge into the dark and mysterious world of underwater caves. Caves ...

Traverse sun-kissed islands and eerie underwater caves, solve intriguing puzzles, and uncover the mystery of the dark creatures that lurk in the deep caves menacing the peaceful aquatic realm.

The cave's underwater passages are winding and maze ... When Zhou was rescued at around 8:30 pm on February 8, he had spent days in a dark, confined space without food and was extremely weak.