The features in a lava tube are different from limestone caves because everything’s based on fluids, he tells me. For instance, there are lavacicles 20 inches long that were created from ...

The Ape Cave (or the Ape Caves) is the third-longest lava tube in the U.S., formed by Mount St. Helens about 2,000 years ago, when a basaltic lava flow ran down the volcano and hardened quickly to ...

Author Joshua Foer explores Kazumura, the world’s longest mapped lava tube, which stretches more than 40 miles and in places is the size of a subway tunnel.

At a little more than a mile, Lava River Cave is Oregon’s longest intact lava tube. It’s also one of the most popular caves to explore in central Oregon. The cave is part of Bend’s Newberry ...

Sometimes, lava tubes can refill with fresh lava after a new eruption – this has happened in Hawai’i, which also happens to be home to Kazumuru Cave, the longest lava tube in the world.

The longest known lava tube on Earth is the 40-mile-long (65 kilometers) Kazumura Cave on the Big Island of Hawaii. However, lava tubes on the Moon and Mars may be even longer.

The lava tube in question is named Umm Jirsan, the longest of the lava tubes in Saudi Arabia’s volcanic field, Harrat Khaybar. Today, wolves, foxes, and snakes inhabit the cave, but it was once ...

In the Harrat Khaybar lava field, about 78 miles (125 kilometers) to the north of Medina in Saudi Arabia is a tunnel system called Umm Jirsan, the longest in the region.

In the Harrat Khaybar lava field, about 78 miles (125 kilometers) to the north of Medina in Saudi Arabia is a tunnel system called Umm Jirsan, the longest in the region.