HomeTank of Gas Getaway 2018Tank of Gas Getaway: Lava River Cave Tank of Gas Getaway: Lava River Cave Tank of Gas Getaway 2018 September 7, 2018 Michelle Houle Descend 30 feet below a major highway into the longest lava tube in Oregon! Leave a Comment:Note: By commenting below you agree to abide by the KOBI5.com commenting guidelines. View the KOBI5.com Comment Board Guidelines »