It dropped down to number two for a while, but more recent exploration confirms Mexico's Ox Bel Ha is officially the longest ...

Divers in Mexico's Yucatan Peninsula say they have discovered the world's largest underwater cave. Underwater archaeologists discovered last week that the cave system known as Sac Actun, located near ...

The Hranicka Abyss is at least 1,325 feet deep, and likely goes down further. — -- A team of explorers believe they have discovered the deepest known underwater cavern the world in eastern Czech ...

Underwater caves off the coast of Sicily offer new clues about the island’s first human inhabitants. They may have arrived by sea, not by land, as previously assumed. Sicily is one of the earliest ...

Cave diving combines the thrill of scuba diving and with the excitement of exploring a cave; it’s a challenging activity even for experienced explorers. At these four sites — some of the most popular ...

A cave diver known for his record-breaking dives and contributions to scientific research has died during an underwater expedition. Divers recovered the body of Brett Hemphill, the 56-year-old ...