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 ...

The cave sits deep within a pit, called the Mare Tranquillitatis pit, which likely formed when a lava tube collapsed. The ...

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 ...

It includes Geomunoreum, regarded as the finest lava tube system of caves anywhere, with its multicoloured carbonate roofs and floors, and dark-coloured lava walls; the fortress-like Seongsan ...

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.

Discovered in 1878, Luray Caverns has been drawing visitors for over a century—and it's easy to see why. Located just west of ...

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 ...

Here's a look at some of the most amazing cave explorations along Iceland's remote coastlines. Located in Snaefellsnes Peninsula, Vatnshellir Cave is one of the most accessible lava tubes in Iceland.

Hawaii is home to some of the most incredible lava tubes that are open to exploration. These include Thurston Lava Tube in Hawaii Volcanoes National Park and Kaumana Caves on the Big Island. Each of ...