Lavacicles, a common feature, are squeezed out of a lava tube’s roof by gases under high pressure and then cooled mid-drip. The gooey appearance of a rock wall in Manu Nui cave was formed when ...

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 ...

What does an ancient lava tube in the Canary Islands have in common with space exploration? For our robotics teams, it turns ...

Advance reservations are required. Make a day of it when exploring Fort Rock and head northeast a bit to this 1,200-foot cave and lava tube. Its 30-foot ceiling and 50-foot width are spacious are ...