The enchanting dunescape stretches over 43 miles (70 km) along the coast and over 30 miles (50 km) inland. Lençois translates as "bedsheets" in Portuguese and refers to the rolling white dunes that ...

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 ...

The moon is hostile. A newly found cave could be a lifesaver. Jupiter’s volcanic moon Io has been erupting for billions of years Jupiter’s volcanic moon Io has been erupting for billions of ...

Jeju Volcanic Island and Lava Tubes together comprise three sites that make up 18,846 ha. It includes Geomunoreum, regarded as the finest lava tube system of caves anywhere, with its multicoloured ...

The caves, lava tubes, to be more precise, are situated on the boundary of Newberry Volcano (see below). The caves are typically open from May to October. Not to fret. At least seven other caves ...

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 ...