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 Canary Islands not only boast the third largest volcano in the world, but also the largest natural underwater lava tunnel ... and a blend of dry and submerged cave sections.

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 ...

Prior to the Lava Caves biome of the Fields of Mistria mines, the only pieces of equipment we’d really need to use were the pickaxe and sword. Once you get into this region after breaking the ...

About 5 miles from downtown Hilo, on Kaumana Drive, you'll find the Kaumana Caves. Originally formed in 1881 by lava flow from Mauna Loa, the caves are now accessible to visitors via a metal ladder.