Oregon Field Guide is available to stream ... (strap zips) - [Narrator] And in this case, that means caves. - We think lava tube caves are on every rocky planet in our solar system.

As parts of the lava tube erode and crack over time, invading tree roots siphon moisture that collects, and forests thrive on the surface above. By contrast, lava caves, widely known as lava tubes ...

Bend, Oregon, is home to some of the most ... Twelve miles south of town, you can pay a visit to Lava River Cave. This underground lava tube extends for more than a mile beneath Central Oregon.