By contrast, lava caves, widely known as lava tubes ... so we take them off and shimmy forward in the dark. A choose-your-own-adventure section of Kipuka Kanohina splits into three tunnels ...

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 ...

The caves, lava tubes, to be more precise ... Like our other favorites, caves remember that they are dark, without any light source, are cool (often damp) with uneven footing.

An 8-year-old boy who went missing at Arizona's Lava River Cave on Wednesday night has been ... or three sources of light as it can be "very dark one mile from the nearest light source," according ...