According to the National Park Service, the cave system is “still being explored with no end in sight.” While Wind Cave ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. McGinnis' nail tooth (Clavusodens mcginnisi) depicted hunting a crustation in a reef-like ...

Deep inside this system is the biggest underground room in America, and getting there is a 9-hour grind through stone, water, ...

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 ...

Carlsbad Caverns National Park in southeastern New Mexico is home to 119 known caves, including North America's largest cave chamber, the Big Room. When you purchase through links on our site, we may ...

A previously unknown species of ancient shark has been discovered in Kentucky's Mammoth Cave National Park, home to the world's longest cave system. The system, which is located in the state's ...

International research and highly-specialized divers are bringing an underground, underwater world to the surface ...