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Third crater, created in 1994 and containing green lake, Irazu Volcano, Parque Nacional Volcan Irazu, Cartago, Costa Rica, Central America
Koryaksky volcano seen beyond walkers on crater rim of Avacha volcano, Kamchatka, East Siberia, Russia
Hikers on rim of old crater, Avacha volcano, Kamchatka, East Siberia, Russia
Mt. Fuji and Yamanaka ko (lake), Yamanashi, Japan
Mt. Fuji and Yamanaka ko (lake), Yamanashi, Japan
Mt. Fuji and Yamanaka ko (lake), Yamanashi, Japan
Panoramic view of tufa formations, Valley of the Fairy Chimneys (Pasabag), near Zelve, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Hikers, volcanic scenery and hiking trail, Kirishima National Park, Kagoshima prefecture, Kyushu, Japan, Asia
Wooden jetty and volcanoes in the distance, Lago Atitlan (Lake Atitlan), Guatemala, Central America
Arenal Volcano from the La Fortuna side, Costa Rica
Arenal Volcano from the La Fortuna side, Costa Rica
Arenal Volcano from the La Fortuna side, Costa Rica
Arenal Volcano from the La Fortuna side, Costa Rica
Arenal Volcano from the La Fortuna side, Costa Rica
Arenal Volcano from the La Fortuna side, Costa Rica
Arenal Volcano from the La Fortuna side, Costa Rica
Arenal Volcano near La Fortuna, Costa Rica
Calvario church and volcano, Leon, Nicaragua, Central America
Moyogalpa port and Conception volcano, Ometepe island, Nicaragua, Central America
Church belfry ruins and volcanic cone with smoke plume of Mount Mayon, 2462m, Cagsawa, where 1200 people were buried alive in 1814 eruption, Bicol Province, Luzon Island, Philippines, Southeast Asia, Asia
Volcanic cone with plume of smoke of Mount Mayon, 2462m, and grotto or wayside shrine, Bicol Province, Luzon Island, Philippines, Southeast Asia, Asia
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
Smoke rises from the active crater of Tungurahua Volcano that threatens the nearby town of Banos, Ambato Province, Central Highlands, Ecuador, South America
Village of Penelokan with the volcano of Mount Agung behind, Bali, Indonesia, Southeast Asia, Asia
Cerro Catedral and Lago Toncek, Nahuel Huapi National Park, Bariloche, Patagonia, Argentina, South America
Tourists looking into the crater and view from the rim into the crater of Ranu Kau, Rapa Nui (Easter Island), Chile, South America
Steam plume from rising dome within crater, Mount St. Helens, Washington state, United States of America, North America
Observatory, Mauna Kea, Big Island, Hawaii, United States of America, North America
Mauna Kea, Big Island, Hawaii, United States of America, North America
Mount Etna, Sicily, Italy, Europe
Karangasem Volcano, Bali, Indonesia, Southeast Asia, Asia
Hiker in red jacket walking down new footpath across the volcanic landscape towards Madeira's third highest peak, Pico do Arieiro, Madeira, Portugal, Europe
Penstemon flowers, Mount St. Helens, Mount St. Helens National Volcanic Monument, Washington state, United States of America, North America
Aerial of Honolulu and Diamond Head, Oahu, Hawaii, United States of America, Pacific, North America
Arenal Volcano from the Sky Tram, Costa Rica
View from Mirador del Rio of ferry ship approaching Caleta del Sebo, La Graciosa island, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Erosion with volcanic tuff pillars near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Backpacker walking across dried up lake towards Llaima volcano, Conguillio National Park, Chile, South America
Arenal Volcano from the La Fortuna side, Costa Rica
View from the San Pedro volcano of San Pedro and Lago Atitlan (Lake Atitlan), Guatemala, Central America
Mauna Kea, Big Island, Hawaii, United States of America, North America
Agri Dagi, Mount Ararat, volcano is the highest mountain in Turkey at 5165m, Anatolia, Turkey, Asia Minor, Asia
Rock climber attempts bouldering, and volcano in background, Conguillio National Park, Chile, South America
Koryaksky volcano, 3456m high, conical andesite volcano, Kamchatka, East Siberia, Russia
Griggs volcano overlooks Valley of Ten Thousand Smokes filled by ash in 1912 eruption of Katmai, Katmai Volcano National Park, Alaska, USA, North America
Colourful volcanic rock, Mount Tarawera, Rotorua, South Auckland, North Island, New Zealand, Pacific
Volcano and wind swept trees, Lake District, Puyehue National Park, southern Chile, Chile, South America
Volcano, Vulcan Agua, Antigua, Guatemala, Central America
Volcanic peaks against deep blue sky, Jandia peninsula, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Mount Rainier, volcanic peak, and Emmons Glacier from summit icefield, Cascade Mountains, Washington State, United States of America (U.S.A.), North America
Avacha volcano, lava plug formed in crater in 1991, Koryaksky volcano beyond, Kamchatka, East Siberia, Russia
Teide National Park, Mount Teide (Pico de Teide), Tenerife, Canary Islands, Spain
Arenal Volcano, Arenal, Costa Rica
Observatory, Mauna Kea, Big Island, Hawaii, United States of America, North America
Mt Ngauruhoe volcano, beyond Red Crater, in the Tongariro National Park, Taupo, North Island, New Zealand
Penstemon flowers, Mount St. Helens, Mount St. Helens National Volcanic Monument, Washington state, United States of America, North America
Sumeru volcano erupting, island of Java, Indonesia, Southeast Asia, Asia
Villarrica Volcano, Villarrica National Park, Pucon, Chile, South America
Observatory, Mauna Kea, Big Island, Hawaii, United States of America, North America
El Teide, Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Europe
Mount St. Helens, Mount St. Helens National Volcanic Monument, Washington state, United States of America, North America
Lassen Volcanic National Park, California, United States of America, North America
Mount St. Helens, with steam plume from rising dome within crater, seen from Johnston Ridge Visitor Centre, Washington state, United States of America, North America
Lassen Volcanic National Park, California, United States of America, North America
Mount Teide, Tenerife, Canary Islands, Spain, Europe
Mount Gunung Batur volcano, Bali, Indonesia
Mount Vesuvius behind the ruins of the Roman resort of Herculaneum, destroyed in the eruption of AD 79 which covered the town in lava and mud, Herculaneum, near Naples, Campania, Italy, Europe
Eruptions at the Monti Calcarazzi fissure and the Piano del Lago cone, above, on Mount Etna that threatened tourist facilities and villages in 2001, Sicily, Italy, Europe
Mount Etna volcano from Taormina, Mount Etna Region, Sicily, Italy, Europe
Volcanic peaks of the Pitons, Soufriere Bay, St. Lucia, Caribbean, West Indies, Central America
Snow covered frozen Viti (Hell) crater near Krafla power plant, Lake Myvatn, North area, Iceland, Polar Regions
Hot pools and boiling mud at Namaskard thermal area, Hverarond, near Lake Myvatn, North area, Iceland, Polar Regions
Mount Sibayak, 2094m high, an active volcano in the Karo Highlands, North Sumatra, Sumatra, Indonesia, Southeast Asia, Asia
Hikers, volcanic scenery and hiking trail, Kirishima National Park, Kagoshima prefecture, Kyushu, Japan, Asia
June 2006 - Ejection of lava during nighttime Strombolian eruption of Stromboli volcano, Aeolian Islands, Mediterranian Sea, Italy.
November 2007 - Snow-covered Ngauruhoe cone, Mount Tongariro volcano, New Zealand.
May 20, 2008 - Lava bomb trajectories visible during nighttime vulcanian eruption of Anak Krakatau volcano, Sunda Strait, Java, Indonesia.
May 20, 2008 - Lava bomb trajectories visible during nighttime vulcanian eruption of Anak Krakatau volcano, Sunda Strait, Java, Indonesia.
Tousside volcano above Trou du Natron, Tibesti Mountains, Chad
The peak of Mount Lokon, a stratovolcano with Tompaluan active crater on its flank, near Tomohon city, Gunung Lokon, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia
The verdant slopes of the active Tungurahua Volcano that threatens the nearby town of Banos, Ambato Province, Central Highlands, Ecuador, South America
The spectacular scenery on the island of Madeira, Atlantic Ocean, Portugal
Mountain landscape on Kilimanjaro, 5895 metres, UNESCO, highest mountain in Africa and one of the Seven Summits, Tanzania
Mountain landscape on Kilimanjaro, 5895 metres, UNESCO, highest mountain in Africa and one of the Seven Summits, Tanzania
View over Roque Bentayga to Teide on Tenerife, Gran Canaria, Canary Islands, Spain, Atlantic, Europe
Pico Viejo, Caldeira de las Canadas, Mount Teide, Mount Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic Ocean, Europe
Sunrise at Mount Fuji in autumn, Fujiyoshida Chureito Pagoda, and fall leaves, Honshu, Japan, Asia
Mountains around Pico do Arieiro peak, Santana, Madeira, Portugal, Atlantic, Europe
Leirhnjukur thermal area and eruption site near Krafla geothermal power station, Lake Myvatn, North area, Iceland, Polar Regions
Sombrero Chino (Chinese Hat) Island, just off Santiago Island in the Galapagos, UNESCO World Heritage Site, Ecuador, South America
Mount Teide, Tenerife, Canary Islands, Spain, Europe
Fertile volcanic soil fields with Mount Lokon peak, an active stratovolcano beyond, near Tomohon city, Gunung Lokon, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia
Tourists around the hot mud pools at Namaskard thermal area, Hverarond, near Lake Myvatn, North area, Iceland, Polar Regions
Arenal Volcano from the La Fortuna side, Costa Rica
Aerial view of volcanic rocks of Pico de la Zarza mountain peak during a misty sunrise, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Volcano Osorno and Lake Lanquihue (Llanquihue), Chile, South America
The peak of Concepcion volcano and a black sand beach on Ometepe Island, Lake Nicaragua, Nicaragua, Central America
Sulphur vents, Mount Asahidake, island of Hokkaido, Japan, Asia
The crater of a volcano on the island of Santo Antao, Cape Verde Islands, Atlantic Ocean
Tourists around the steam jets at Namaskard thermal area, Hverarond, near Lake Myvatn, North area, Iceland, Polar Regions