Another world greets you just a short 30-minute drive from the Icelandic capital Reykjavik. Raufarhólshellir Lava Tunnel is a terrific example of a lava cave created following a volcanic eruption ...

The Lava River Cave exhaled chilled air. I put on my sweatshirt, despite the hot July day. Though I'd been warned about the sudden drop in temperature to a crisp 42 degrees, it was hard to believe I'd ...

FLAGSTAFF — Did you know Flagstaff is home to one of the largest lava tube caves in the country? The Lava River Cave in the Coconino National Forest stretches over a mile underground and was formed ...

Sometimes, a hole in the ground is just a hole. Other times, it’s a portal to an underground cave spanning miles in width and length. You don’t really know what’s inside unless you dive into the void.

No trip to Central Oregon would be complete without exploring one of the region's defining geological features: the vast expanses of hardened lava that diverted the Deschutes, formed mounds of gumdrop ...

A couple in Oregon are selling a house with an added extra room – a large underground lava cave. On Sunday, Suzanne and James Brierley told local news outlet KTVZ 21 they brought the property and ...

The interior of Lava River Cave, shown here, has intact wall linings that showcase the basalt interior of the lava tubes. While a "flat floor" may be rare inside lava tubes, both on Earth and Mars, ...

If you're up for an adventure, the Lava River Cave delivers. Approximately 700,000 years ago when molten rock erupted from a vent in nearby Hart Prairie, the milelong Lava River Cave was formed. Today ...

NEAR FLAGSTAFF, Ariz. (FOX 10) --There are many popular hiking trails in and around Flagstaff. One of those trails, completely underground, is considered a volcanic wonder. Just west of Snowbowl, ...

The mile-long lava tube south of Bend is the latest natural wonder in Oregon requiring reservations to reduce crowding. Visitors descend into Lava River Cave, a mile-long lava tube south of Bend, Ore.

As humanity's next trip to the Moon inches closer, space agencies are thinking of ways through which future astronauts can successfully colonize and live on the Moon and other planets Ideas have ...