Iceland's Vatnajökull Glacier is one of the most beautiful—and geologically important—places in the country.

Few natural wonders are as breathtakingly surreal as the electric blue flames dancing across Indonesia's Kawah Ijen volcano. Unlike the familiar red-orange glow of molten lava, this volcano gives off ...

The Pacific's hidden underwater volcano is on the brink of eruption, capturing the attention of scientists worldwide. Rising pressure beneath the seafloor indicates magma movement, as sensors report ...

In 79 AD, Pompeii is alive with noise, commerce, and spectacle - until Mount Vesuvius turns an ordinary day into a catastrophe. We move through the amphitheater, the forum, and the homes of rich and ...

A powerful swarm of earthquakes in January suggested one of Iceland’s giant “ice volcanoes” may be awakening after a decade of slumber. In the months that followed, more earthquakes have rocked the ...

Europe's most active volcano, Mount Etna, has erupted again on the island of Sicily. Huge lava fountains and plumes of ash were seen being sent high into the night sky over the weekend. Mount Etna's ...