Hiking Arizona's Longest Lava Tube | Lava River Cave

In my quest to explore all that the state has to offer above and below ground, I visit the fascinating Lava River Cave outside of Flagstaff in northern Arizona. While I've visited this geologic marvel before, I return with my fiancée for a day trip to explore the history of this three-quarter mile long (former) lava tunnel and have a picnic at the end of it.
More History and Trail Info: azoffroad.net/...