Incredible scenes at Hawaii's Kīlauea volcano on Wednesday: over a 13-hour period, a towering fountain of lava spewed from the Halema'uma'u crater, reaching heights of 400 feet.

The Savonoski Crater is a round hole in Alaska's Katmai National Park that has defied scientific explanation ever since it was discovered.

Alaska, largely unspoiled wilderness, looks like something out of The Lord of the Rings.

Kilauea, one of the world’s most active volcanoes, has been erupting on and off for nearly two months since it burst to life ...

Santorini, one of the most popular tourist destinations in Greece, could soon be swamped by volcanic eruptions and tsunamis. The island has been rattled by 6,400 minor and moderate earthquakes ...

Sunset Crater Volcano National Monument highlights northern Arizona’s volcanic (and explosive) past, speckled with cinder cones and long-hardened lava flows People often get Sunset Crater confused ...

The island is famed for its caldera – a bowl-shaped crater caused by a volcanic eruption – which was formed by one of the largest known blasts around 3,600 years ago. Santorini’s most recent ...

Now, millions of visitors each year come to see its dramatic scenery of whitewashed houses and blue-domed churches clinging to the cliff along the flooded caldera, or volcanic crater. Last week ...

ATHENS, Greece (AP) — Multiple earthquakes are rattling Santorini, a volcanic island in Greece, prompting authorities to dispatch rescuers with tents, a sniffer dog and drones, and to shut ...