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Third crater from the summit of Irazu, highest in Costa Rica at 3432m, last erupted 1994, Parque Nacional Volcan Irazu, Cartago, Costa Rica, Central America
Plumes of steam where the lava reaches the sea, Kilauea Volcano, Hawaii Volcanoes National Park, UNESCO World Heritage Site, Island of Hawaii (Big Island), Hawaii, United States of America, Pacific, North America
Irregular blocky lava (a'a) and cinder cones of the volcanic landscape of Timanfaya National Park, Lanzarote, Canary Islands, Spain, Atlantic Ocean, Europe
Valagja Gorge, a bright-coloured volcanic fissure north-east of Mount Hekla volcano, south Iceland (Sudurland), Iceland, Polar Regions
Krafla volcano near Lake Myvatn, Reykjahlid, Iceland, Polar Regions
Colourful springs of acid in Dallol, hottest place on earth, Danakil depression, Ethiopia, Africa
Hikers on Dome Ridge near the summit of 2797m Mount Ruapehu, highest and most active of the volcanoes in the National Park, Tongariro National Park, UNESCO World Heritage Site, central plateau, North Island, New Zealand, Pacific
Rice paddy fields in centre of the island, Bali, Indonesia, Southeast Asia, Asia
Cacti, Stromboli Island, Eolian Islands (Aeolian Islands), UNESCO World Heritage Site, Italy, Mediterranean, Europe
The two great 13000ft volcanic peaks of Mauna Loa on right, and Mauna Kea on the Big Island seen from the top of the Haleakala volcano, Maui, Hawaii, Hawaiian Islands, United States of America, Pacific, North America
Volcanic cinder cone on Graciosa Island and the Graciosa to Lanzarote ferry in the Rio strait, seen from the Mirador del Rio on the north west coast of Lanzarote, Graciosa Island, Canary Islands, Spain, Atlantic, Europe
View from Volcan Cotopaxi, 5897m, the highest active volcano in the world, Ecuador, South America
Volcanic cone over the vineyards of Lanzarote, Canary Islands, Spain, Atlantic, Europe
Trekkers and Oldonyo Lengai volcano, Ngorongoro Conservation Area, Tanzania, East Africa, Africa
Mount Damavand, Elburz Mountains, Iran, Middle East
Tabacon Hot Springs, volcanic hot springs fed from the Arenal Volcano, Arenal, Costa Rica, Central America
Arenal volcano, La Fortuna, Costa Rica, Central America
Arenal volcano, La Fortuna, Costa Rica, Central America
Gros Piton, UNESCO World Heritage Site, and reflection in the swimming pool at Sugar Beach, St. Lucia, Windward Islands, West Indies, Caribbean, Central America
Horsemen on Mount Bromo volcano, Eastern Java, Indonesia, Southeast Asia, Asia
Moss covered lava beds surround Snaefellsjokull, an active strato volcano capped in snow and ice, on the Snaefellsnes Peninsula, North West area, Iceland, Polar Regions
Looking across the old crater towards the smoking 2438m summit of the active volcano Mount Canison, Visayan island of Negros, Philippines, Southeast Asia, Asia
Lavas from Ardoukoba volcano in Rift Valley 152m below sea level, Afar Triangle, Djibouti, Africa
Amed beach, island of Bali, Indonesia, Southeast Asia, Asia
Worker carrying big pieces of sulphur out of the Ijen Volcano, Java, Indonesia, Southeast Asia, Asia
Tabacon Hot Springs, volcanic hot springs fed from the Arenal Volcano, Arenal, Costa Rica, Central America
Lava flow, Kilauea, Hawaii Volcanoes National Park, UNESCO World Heritage Site, Island of Hawaii (Big Island), Hawaii, United States of America, North America
Mount Teide (Pico del Teide) from the east, Parque Nacional de Las Canadas del Teide (Teide National Park), Tenerife, Canary Islands, Spain, Europe
Russian truck stops at a viewpoint over the lava sand field of the Tolbachik volcano, Kamchatka, Russia, Eurasia
Cinder cones in the centre of the island near Tinajo, a relic of the island's active volcanic past, Lanzarote, Canary Islands, Spain, Atlantic Ocean, Europe
Lake Atitlan, Western Highlands, Guatemala, Central America
Lake Atitlan, Western Highlands, Guatemala, Central America
Cattle grazing in a field with the Osorno volcano behind in the Lake District in Chile, South America
Volcano, Stromboli Island, Eolian Islands (Aeolian Islands), UNESCO World Heritage Site, Italy, Mediterranean, Europe
Atacama Desert and Volcan Licancabur, San Pedro de Atacama region, Chile, South America
Tabacon Hot Springs, volcanic hot springs fed from the Arenal Volcano, Arenal, Costa Rica, Central America
Cooled lava from recent eruption, Kilauea Volcano, Hawaii Volcanoes National Park, UNESCO World Heritage Site, Island of Hawaii (Big Island), Hawaii, United States of America, North America
Hot lava flowing onto beach and into the ocean, Kilauea Volcano, Hawaii Volcanoes National Park, UNESCO World Heritage Site, Island of Hawaii (Big Island), Hawaii, United States of America, North America
White cross is a marker to check for land movement within the caldera, with the Pico de Fogo volcano in the background, Fogo (Fire), Cape Verde Islands, Africa
Motorhome below Mount Ngauruhoe with Kiwi crossing sign, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, South Pacific
Summit crater, Volcan Cotopaxi, 5897m, the highest active volcano in the world, Ecuador, South America
Late winter hiker on Tongariro Crossing, Mount Ngauruhoe and South Crater, Tongariro National Park, UNESCO World Heritage Site, Taupo, South Auckland, North Island, New Zealand, Pacific
Vesuvius volcano from ruins of Forum buildings in Roman town, Pompeii, Campania, Italy, Europe
Bromo-Tengger-Semeru National Park at dawn, island of Java, Indonesia, Southeast Asia, Asia
Arenal volcano from afar, Muelle, Alajuela, Costa Rica, Central America
Tabacon Hot Springs, volcanic hot springs fed from the Arenal Volcano, Arenal, Costa Rica, Central America
Skylight, view through cooled lava to molten lava below, Kilauea Volcano, Hawaii Volcanoes National Park, Island of Hawaii (Big Island', Hawaii, United States of America, North America
Steam plumes from hot lava flowing onto beach and into the ocean, Kilauea Volcano, Hawaii Volcanoes National Park, UNESCO World Heritage Site, Island of Hawaii (Big Island), Hawaii, United States of America, North America
Active mud flow from line of mud volcanoes, in the Firuze crater, Gobustan, Baku, Azerbaijan, Central Asia, Asia
Tourists hiking on an old lava flow from an eruption, Mount Etna, UNESCO World Heritage Site, Sicily, Italy, Europe
Climbers on the glacier of Volcan Cotopaxi, 5897m, the highest active volcano in the world, Ecuador, South America
Climbers on summit of El Misti volcano, 5822m, Arequipa, Peru, South America
Saint Pierre Bay, with Mont Pele volcano, Martinique, West Indies, Caribbean, Central America
Mount Teide and Las Rochas, Tenerife, Canary Islands, Spain, Europe
Dormant volcano, Mount Ngauruhoe, Tongariro National Park, UNESCO World Heritage Site, Taupo, South Auckland, North Island, New Zealand, Pacific
Altiplano and high-level volcanoes, El Tatio basin, above Calama, Atacama Desert, Chile, South America
Steam plume off boiling acid lake, Naka-dake active crater, Aso volcano, Kyushu, Japan, Asia
Steaming volcanic mud pools, Rincon de la Vieja National Park at foot of Rincon Volcano, Guanacaste, Costa Rica, Central America
Poas Volcano, Poas National Park, Costa Rica, Central America
Nisqually Glacier in foreground, with Mount Rainier, the volcano which last erupted in 1882, 4392m high, beyond, Cascade Mountains, Washington State, United States of America (U.S.A.), North America
Lake Shoji, with Mount Fuji behind, Shojiko, Central Honshu, Japan, Asia
Hikers in front of Mount Ngauruhoe, 2287m, on the Tongariro Crossing, Tongariro National Park, the oldest national park in the country, UNESCO World Heritage Site, Taupo Volcanic Zone, North Island, New Zealand, Pacific
Man walking on dry lake bed with Llaima Volcano in distance, Conguillio National Park, Chile, South America
Batur, Bali, Indonesia, Southeast Asia, Asia
Arenal volcano and tropical forest, La Fortuna, Costa Rica, Central America
Poas Volcano, Poas Volcano National Park, Costa Rica, Central America
Lava beds surround Snaefellsjokull, an active strato volcano capped in snow and ice, on the Snaefellsnes Peninsula, North West area, Iceland, Polar Regions
Ignimbrite exposed in river canyons cut since 1912 eruption, in the Valley of Ten Thousand Smokes, in Katmai Volcano National Park, Alaska, United States of America, North America
Recent pahoehoe basalt lavas, Erte Ale volcano, Danakil Depression, Ethiopia, Africa
Mount Batur volcano and lake at sunrise, Bali, Indonesia, Southeast Asia, Asia
Moai quarry, Ranu Raraku Volcano, UNESCO World Heritage Site, Easter Island (Rapa Nui), Chile, South America
Small boats beside Lake Shoji, with Mount Fuji behind, Shojiko, Central Honshu, Japan, Asia
Tourists hiking on an old lava flow from an eruption, Mount Etna, UNESCO World Heritage Site, Sicily, Italy, Europe
Poas Volcano, Poas Volcano National Park, Costa Rica, Central America
Climbers on the glacier of Volcan Cotopaxi, 5897m, the highest active volcano in the world, Ecuador, South America
Tourist walking along rim of Gunung Bromo, Bromo-Tengger-Semeru National Park, Java, Indonesia, Southeast Asia, Asia
Mount Fuji (3776m), cable car, Hakone, Honshu Island, Japan, Asia
Motorhome below Mount Ngauruhoe, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, South Pacific
Tourist walking through sulphur smog on the Tolbachik volcano, Kamchatka, Russia, Eurasia
Visitors at an active andesite stratovolcano on White Island, North Island, New Zealand, Pacific
Volcano House, Cesar Manrique Foundation, Tahiche, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Steam plumes from hot lava flowing onto the beach and hitting the ocean, Kilauea Volcano, Hawaii Volcanoes National Park, UNESCO World Heritage Site, Island of Hawaii ('Big Island'), Hawaii, United States of America, North America
Lava dome in crater seen from rim, Mount St. Helens after 1980 eruption, with Spirit Lake and Mount Rainier in the distance, Mount St. Helens National Volcanic Monument, Washington State, United States of America (U.S.A.), North America
Smoke billowing out from volcano vent, Sulphur Lake, Kawah Ijen, Ijen Plateau, Java, Indonesia, Southeast Asia, Asia
Mount Teide, Tenerife, Canary Islands, Spain, Atlantic, Europe
Ruins at Saint Pierre, where in 1902 Mont Pelee volcano erupted, killing 30000 inhabitants, Martinique, Lesser Antilles, West Indies, Caribbean, Central America
Coffee plantations on the slopes of the Poas Volcano, near San Jose, Costa Rica, Central America
View from the caldera of the volcano of Pico de Fogo, Fogo (Fire), Cape Verde Islands, Africa
Hikers at Red Crater on the Tongariro Crossing, Tongariro National Park, the oldest national park in the country, UNESCO World Heritage Site, Taupo Volcanic Zone, North Island, New Zealand, Pacific
Bus and the famous El Nariz del Diablo (The Devil's Nose) train en route to Riobamba with 6310m Chimborazo volcano in the distance, Riobamba, Chimborazo Province, Central Highlands, Ecuador, South America.
View of Taormina with Mount Etna in the background, Giardini Naxos, Sicily, Italy, Europe
Arenal volcano, La Fortuna, Costa Rica, Central America
Greek theatre and Mount Etna, Taormina, Sicily, Italy, Europe
Cattle below the volcanic cone on the island of Pico in the Azores, Portugal, Atlantic, Europe
Blisters measuring about 10 cm across in boiling mud pool, Mud volcano, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Site of Gedong Songo, island of Java, Indonesia, Southeast Asia, Asia
Bromo-Tengger-Semeru National Park at dawn, island of Java, Indonesia, Southeast Asia, Asia
Kilauea volcano crater showing solidified ropy lava called pahoehoe, The Big Island, Hawaii, Hawaiian Islands, United States of America, North America
Hakone, Kanagawa prefecture, Japan, Asia
Koryaksky volcano, 3456m high, conical andesite volcano, Kamchatka, UNESCO World Heritage Site, Eastern Siberia, Russia, Eurasia