When the lava tube is active, lava flows along its floor at temperatures of around 2,000º F (1090º C). When it empties, it leaves behind a cave. Although it was known that Northern Arabia had ...

Kilauea in Hawaiʻi Volcanoes National Park is arguably one of the world’s most famous active volcanoes, and hiking here gives you a chance to see lava tubes, craters, and (if you are lucky ...

Kazumura lies beneath the eastern slope of Kilauea, the most recently active volcano on Hawaii’s Big Island. Festooned with trippy Dr. Seuss–like ornaments, the lava tubes of Hawaii seem to ...