MORE: 5 bodies recovered from sunken superyacht off Sicily as search continues The Lava River Cave is a mile-long lava tube cave formed ... located near Flagstaff, according to the Coconino ...

Recent visitors were awe-struck by the experience of hiking a tube cave ... (such as a headlamp). Lava River Cave is located almost 20 miles northwest of downtown Flagstaff off of U.S. Route ...