There is a cave in the world which has its own ecosystem. This cave has a forest, river, rocks, trenches and much more. It was declared the world's largest cave in 2009.

Centuries of eruptions on the Big Island have created hidden ... trying to build atop burial caves, says that whenever human remains are found inside a lava tube, they render the entire cave ...

They had crawled into Cave of the Winds, deep inside a cave system known as Clearwater ... and Deepest Committee,” such a feat would be a very big deal. Elsewhere far below the Earth’s ...

Take an otherworldly journey through Hang Son Doong, the world's largest cave located in Vietnam. The cave is more than 500 feet tall, 650 feet wide, and 29,500 feet long. Video courtesy of Ryan ...

Scientists have found ancient nail tooth shark fossils deep inside Mammoth Cave in Kentucky, revealing new information about ...

Those lucky enough to step inside the ice caves described them as "beautiful ... it’s like something that is very big compared to me. I feel like I’m a small creature when I’m in this ...