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Third crater, created in 1994 and containing green lake, Irazu Volcano, Parque Nacional Volcan Irazu, Cartago, Costa Rica, Central America
Eruption and lava flow from the Monti Calcarazzi fissure on the southern flank of Mt Etna in 2001, the flow threatened the town of Nicolosi below, Mt Etna, Sicily, Italy
Gorely volcano, tundra plants on slopes, summit crater rims on skyline, Kamchatka, East Siberia, Russia
Koryaksky volcano, andesitic cone seen from shoulder of Avacha volcano, Kamchatka, East Siberia, Russia
Koryaksky volcano seen beyond walkers on crater rim of Avacha volcano, Kamchatka, East Siberia, Russia
Steam plume from active vent beside crater lake, Volcan Poas, Cordillera Central, Costa Rica, Central America
Restored buildings in Roman town buried in AD 79 by ash flows from Mount Vesuvius, in the background, Pompeii, UNESCO World Heritage site, Campania, Italy, Europe
Tourists ascending recent volcanic cone, Penguin Island, South Shetland Islands, Antarctica, Polar Regions
View of active volcano from helicopter, Big Island, Hawaii, Hawaiian Islands, United States of America (U.S.A.), North America
Hill town with backdrop of snowy volcano Mount Etna, Gangi, Palermo Province, Sicily, Italy, Mediterranean, Europe
Hill town with backdrop of snowy volcano Mount Etna, Gangi, Palermo Province, Sicily, Italy, Mediterranean, Europe
Hikers from the cablecar near the smoking summit of 3350m volcano Mount Etna during an active phase, Mount Etna, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe
Ash, rock and sulphur at the smoking summit of 3350m high volcano Mount Etna during an active phase, Mount Etna, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe
Agave succulent plant and active volcano 3350m Mount Etna seen at this northeast tourist town, Taormina, Catania Province, Sicily, Italy, Mediterranean, Europe
Glowing active volcanic crater of Volcan Telica on a starry night, with the Milky Way, Orion and the Pleiades, Leon, Nicaragua, Central America
Smoke rises from the active crater of Tungurahua Volcano that threatens the nearby town of Banos, Ambato Province, Central Highlands, Ecuador, South America
Aerial view of Mount Nyiragongo, an active volcano in the Virunga Mountains in Virunga National Park, near the border with Rwanda, known for its recent devastating eruptions, Democratic Republic of the Congo, Great Rift Valley, Africa
Aerial view of Mount Nyiragongo, an active volcano in the Virunga Mountains in Virunga National Park, near the border with Rwanda, known for its recent devastating eruptions, Democratic Republic of the Congo, Great Rift Valley, Africa
Aerial view of Mount Karisimbi, a dormant volcano in the Virunga Mountains on the border between Rwanda and the Democratic Republic of Congo (DRC), at 4507m the highest of the mountain range, Great Rift Valley, Africa
Aerial view of Mount Sabyinyo, an extinct volcano and oldest of the Virunga Mountains, the summit at 3645ï¾ metres marks the intersection of the borders of Democratic Republic of the Congo (DRC), Rwanda, and Uganda, Virunga Volcanoes, Africa
Aerial view of Mount Visoke (Mount Bisoke), an extinct volcano straddling the border of Rwanda and Democratic Republic of the Congo (DRC) showing crater lake, with Mount Mikeno in background, Virunga Volcanoes, Great Rift Valley, Africa
Aerial view of Mount Nyiragongo, an active volcano in the Virunga Mountains in Virunga National Park, near the border with Rwanda, known for its recent devastating eruptions, Democratic Republic of the Congo, Great Rift Valley, Africa
Hiker in red jacket walking down new footpath across the volcanic landscape towards Madeira's third highest peak, Pico do Arieiro, Madeira, Portugal, Europe
Death Valley (Valle de la Muerte) and Licancabur Volcano, San Pedro de Atacama, Atacama Desert, North Chile, Chile, South America
Acid Crater Lake, White Island Volcano, an active volcano in the Bay of Plenty, North Island, New Zealand, Pacific
Mount Bromo (Gunung Bromo), an active volcano, erupting at sunrise throwing up ash clouds, East Java, Indonesia, Southeast Asia, Asia
Mount Ruapehu, Ngauruhoe and Tongariro (active volcanoes) from Lake Taupo, North Island, New Zealand, Pacific
Glowing active volcanic crater of Volcan Telica at night with star trails and shooting star (meteor) on right, Leon, Nicaragua, Central America
The North West volcanic chain, distant on left Momotombo, centre Rota and Las Pilas complex, on right Momotombito and Santa Clara, Leon, Nicaragua, Central America
Active Gunung Bromo volcano at night, Bromo-Tengger-Semeru National Park, Java, Indonesia, Southeast Asia, Asia
Aerial of Taupo Town and Mount Tauhara, Waikato River and Lake Taupo, North Island, New Zealand, Pacific
Crater of Poas Volcano in Poas Volcano National Park, in the Cordillera Central mountain range of Costa Rica, Central America
The very active lava lake of Mount Nyiragongo, Virunga National Park, UNESCO World Heritage Site, Democratic Republic of the Congo, Africa
Tourists walking through lava field around the very active Erta Ale shield volcano, Danakil depression, Ethiopia, Africa
Sailing on Lake Llanquihue, snow-capped Orsono volcano, from Puerto Varas, Lakes District, Chile, South America
Arenal Volcano and Arenal Lake at sunset, near La Fortuna, Alajuela Province, Costa Rica, Central America
Volcanic beach, Stromboli, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe
Glowing active 700m wide volcanic crater of Volcan Telica with lava vents far below, in the North West volcanic chain, Leon, Nicaragua, Central America
Group of hikers walking up to Mount Etna summit, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Summit of active Volcan San Cristobal, 1745m, in the North West volcano chain, the country's highest volcano, Chinandega, Nicaragua, Central America
Sunrise over the smoking Gunung Bromo volcano, Bromo-Tengger-Semeru National Park, Java, Indonesia, Southeast Asia, Asia
Salt pans and volcanoes in the background, near Yaiza, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Boiling mud at an active andesite stratovolcano on White Island, off the east side of North Island, New Zealand, Pacific
Crater of Poas Volcano in Poas Volcano National Park, in the Cordillera Central mountain range of Costa Rica, Central America
Lake Chungara and the snow capped volcano Parinacota, Lauca National Park, Andes, Chile, South America
Smoking 700m wide crater of Volcan Telica in the North West volcano chain, one of the country's most active volcanoes, Leon, Nicaragua, Central America
Climber looking at sunrise on Volcan Cotopaxi, 5897m, highest active volcano in the world, Ecuador, South America
Aerial view of Mount Nyiragongo, an active volcano in the Virunga Mountains in Virunga National Park, near the border with Rwanda, known for its recent devastating eruptions, Democratic Republic of the Congo, Great Rift Valley, Africa
An active andesite stratovolcano on White Island, off the east side of North Island, New Zealand, Pacific
Petrohue, snow-capped, conical Osorno volcano, Lake Todos Los Santos, Vicente Perez Rosales National Park, Lakes District, Chile, South America
Hikers enjoy the view on the verdant slopes of the active Tungurahua Volcano that threatens the nearby town of Banos, Ambato Province, Central Highlands, Ecuador, South America
Japanese warning sign on the crater rim of Mount Naka active volcano, Mount Aso, Kyushu, Japan, Asia
View over whitewashed houses to Monte Corona volcano cone, village of Maguez, Lanzarote, Canary Islands, Spain, Atlantic, Europe