A Twinkling Wonder Tucked away in New Zealand, the Waitomo Glowworm Caves offer a celestial experience. Visitors glide ...

The cave that the Kanohina system seems poised to supplant in the record books is on the other side of the Big Island. It was likely created during a 15th-century eruption of a different volcano ...

Monks have been seeking spiritual enlightenment at these sites on steep cliffs, inside caves and atop an extinct volcano for ...

São Vicente, in the vast area of Laurissilva, is known as the land of valleys and vineyards, with lush vegetation, volcanic caves, and beautiful picturesque villages. It’s located in one of the ...

Australian researchers said that Mount Erebus, an active volcano on Antarctica's Ross Island, is surrounded by caves hollowed out in the ice by steam. Soil samples retrieved from the caves have ...

Mauna Loa, the world's largest active volcano, is the mighty giant of Hawaii that's still bubbling away, waiting to be explored.