Centuries of eruptions on the Big Island have created hidden networks of passages beneath volcanoes. In December 2016 a large lava delta formed by Kilauea volcano sank into the sea, exposing the ...

Old Boat-Shaped Structure Found Inside a Volcanic Cave With Decorative Minerals Intrigues Archaeologists Apocalypse as a ...

From lava flows to impact craters and fossil beds, this is a country where rock formations tell stories more powerful than ...

Oregon is home to some of the best examples of deep caves and ancient lava beds formed ages ago from the many volcanoes in ...

Approximately 700,000 years ago when molten rock erupted from a vent in nearby Hart Prairie, the mile-long Lava River Cave was formed. Today, visitors can explore the cave's cool, dark expanse by ...

Others formed tens of thousands of years ago. Recently, he explored caves that are even younger: pristine cavities known as lava tubes, forged inside cooling mounds of molten rock during the ...

Holes such as this are of particular interest because they might be portals to lower levels that extend into expansive underground caves," NASA said.

The cave was supposedly formed about 960 years ago from hot lava that cooled to form a top layer, and then once the lava stopped flowing, it created a tube. Don't worry, there are no bats or ...

In one corner of the flow, located in nearby El Malpais National Monument, is a network of subterranean corridors known as lava tubes: long, winding caves big enough to drive a subway train through.

I'll be real: Now that I think about it, the trick I'm about to talk about is incredibly obvious. So I'm begging you, please ...