Oaxaca's Huautla cave is a trove of history, nature and wonder. John Pint explores Mexico's (and the Western Hemisphere's) ...

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 ...

PRAGUE (Reuters) - Czech divers are preparing to search the world's deepest underwater cave again to see if there is more to be discoverer from its already record-breaking depths. Last September ...

Sixty metres beneath one of southern Africa's driest landscapes lies a world that seems strangely detached from everything ...

Driven by the growing interest, Guizhou's cave tourism has evolved beyond explorations featuring ziplines and wire bridges. It has developed into a multi-tiered industry catering to diverse appetites, ...

To date, no one has been able to figure out how deep that cave actually is or where it ends, and Jim's story is not an outlier. Several similar caves have outsmarted explorers and occasionally claimed ...