An underground stream winds through a vast Illinois cave few people know about. Wade through cool water and explore one of the state’s most surprising adventures.

The cenotes of Mexico are famous not only for their beauty, but for the archaeological finds they reveal.

Mammoth Cave, located beneath Kentucky’s rolling hills, is the longest known cave system on Earth, extending a staggering 426 ...

Deep underground in a dark, sulfuric cave on the border between Albania and Greece, scientists have made an incredible discovery – a giant communal spider web spanning more than 100 square meters ...

JERUSALEM — Israeli scientists said Wednesday that they had discovered a prehistoric ecosystem dating back millions of years. The discovery was made in a cave near the central Israeli city of Ramle ...

Deep inside Puerto Rico’s caves, a snake hangs silently from the ceiling, waiting. With perfect timing, the Puerto Rican boa lunges mid-air to snatch flying bats. How does this unusual hunting trick ...

Rangers at Carlsbad Caverns National Park in southern New Mexico describe it as a “world-changing” event for the tiny microbes and insects that call this specialized subterranean environment home. The ...

With high carbon dioxide, low oxygen and no photosynthesis, here’s how an entire ecosystem persists in one of the world’s most extreme environments. Life, as we know it, is exceptionally good at ...