Lava River Cave, Flagstaff

Formed nearly 700,000 years ago by molten rock erupting from a volcanic vent in nearby Hart Prairie, this mile long tube is an incredible example of a cave formed in only a few hours as opposed to other lengthy geological events that formed the Arizona canyons. Because the conditions in this cave are cold and dark be sure to bring a dependable source of light, warm clothes and sturdy shoes. Steps have been formed using lava rocks to ease entrance into the cave, which instead of walking into must be entered from above. An interpretive center is also at the site, detailing the geology of the cave and its fascinating creation. -Herman Sims

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