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 ...

A team of divers has discovered that the largest cave in the world is even bigger than anybody previously thought.

Add Yahoo as a preferred source to see more of our stories on Google. Scientists working in an underground cavern between Greece and Albania have discovered the world’s largest spider web, according ...

A cave once known only to hunters and explorers is now helping to stabilize livelihoods for communities in central Vietnam, near the border with Laos. After strict limits were placed on the world's ...