A lava tube is a cave that forms after a volcanic eruption. You can visit the country's third-longest tube in Washington state, formed after Mount St. Helens.

The Big Island of Hawaii is home to Kazumura Cave, the longest lava tube in the world.

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 ...

These lava tubes should ideally be found anywhere in the universe near basalt volcanoes, like on the moon or Mars, but that notion has long been hypothetical — until now.

The lava tube in question is named Umm Jirsan, the longest of the lava tubes in Saudi Arabia’s volcanic field, Harrat Khaybar.

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.

People in the Arabian desert once occupied natural underground tunnels thousands of years ago that were made of cooled lava, archaeologists have discovered.

Utilizing lava tubes as habitats has garnered both fascination and skepticism. Are these natural formations the answer to space dwellings?

An 8-year-old boy who went missing for over a day while his family was visiting a national forest in northern Arizona has been found safe.

By contrast, lava caves, widely known as lava tubes, are formed in a geological instant—a year or two, sometimes weeks—by an eruption from the Earth’s crust.

The longest lava tube in Oregon, the Lava River Cave, stretches for about a mile through the Newberry National Volcanic Monument south of Bend. It was formed about 65,000 years ago.