Deep under the Chihuahuan Desert is a natural wonder, a cave filled with beautiful giant crystals, but which also happens to be a potential death trap.

Sarawak Chamber, briefly illuminated by dozens of flashbulbs, is the largest cave chamber yet discovered on Earth—more than twice the size of Britain’s Wembley Stadium—and home to thousands ...

It is the largest single cave chamber on the continent. We decided to walk the Big Room Trail, a 1.25 mile long loop that would take us around the entire chamber. Upon reaching the start of the trail, ...

Sign me up! Vietnam’s Dragon Pearl Cave offers an extraordinary opportunity for travellers to dine in a 150-million-year-old ...

With high carbon dioxide, low oxygen and no photosynthesis, here’s how an entire ecosystem persists in Movile Cave, one of the most extreme environments on Earth.

The “vertical cave” had a series of caverns descending sharply in a step-like manner with steep drops from one chamber to the next. Deep inside the cave, Willyanto noticed several shallow ...