Arizona has numerous famous caves — some readily open to the public ... fs.usda.gov. This milelong lava tube north of Flagstaff formed about 700,000 years ago. During a volcanic eruption ...

An 8-year-old boy spent a night lost and alone in the woods after making a wrong turn out of a lava tube cave in Arizona, ...

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 ...