Deep in Central Oregon lies a short yet unnervingly narrow lava‑tube hike full of basalt corridors and tight passages where ...

Walk across black volcanic lava fields, explore lava caves, and stargaze at this lesser-known park in New Mexico. It's a ...

Hawaii’s Kilauea volcano has been shooting lava from its summit crater at semiregular intervals since late last year.

Give yourself plenty of time to explore both the Dewdrop Cave and the Indian Tunnel. Dewdrop Cave is the first cave you will ...

A research team from the Space Robotics Laboratory at the University of Malaga, involved in the project, is testing and validating three robots on the volcanic island of Lanzarote, Spain. Protecting a ...

Eight possible cave openings found on the Martian surface look to have once had ancient streams flowing into them, suggesting they are promising places to look for evidence of life ...

Skylights, openings in the surface of Mars that descend down into caves, have been found on Mars, along with signatures for ...

What might begin as a stroll through bird calls, tropical flowers, and ferns quickly transforms into an eerie adventure ...

The federal Bureau of Prisons is closing a California lockup that was once home to Al Capone and Charles Manson over concerns ...

It’s more than just legend that Mount Etna nourishes all that is spread along her foothills in Sicily. For centuries, locals ...