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Colourful springs of acid in Dallol, hottest place on earth, Danakil depression, Ethiopia, Africa
Horsemen and horses on the banks of Mount Bromo volcano, Eastern Java, Indonesia, Southeast Asia, Asia
Sulphur miner of Ijen volcano, Eastern Java, Indonesia, Southeast Asia, Asia
Sulphur miner of Ijen volcano, Eastern Java, Indonesia, Southeast Asia, Asia
The main square of Granada with view to the Mombacho Volcano in the background, Granada, Nicaragua, Central America
Volcano House, Cesar Manrique Foundation, Tahiche, Lanzarote, Canary Islands, Spain, Atlantic, Europe
View across the rim of the dormant San Fernando crater of the Volcan Masaya in the Volcan Masay National Park, Nicaragua, 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
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
Volcano, Lake Atitlan, Atitlan, Guatemala, Central America
Trekkers and Oldonyo Lengai volcano, Ngorongoro Conservation Area, Tanzania, East Africa, Africa
Eruption of highly active Volcan Pacaya, a popular tourist sight south of Guatemala City, Guatemala, Central America
Laguna Verde with mineral flat margin and Volcan Licancabur, 5960m, Southwest Highlands, Bolivia, South America
Fissure vent with spatter cones, Laki Volcano, Iceland, Polar Regions
Tourists bathing in mud bath, Volcan de Lodo El Totumo, Mud Volcano, Colombia, South America
Volcano House, Cesar Manrique Foundation, Tahiche, Lanzarote, Canary Islands, Spain, Atlantic, Europe
View across city from El Alto, with Illimani volcano in distance, La Paz, Bolivia, South America
Worker carrying big pieces of sulphur out of the Ijen Volcano, Java, Indonesia, Southeast Asia, Asia
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
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
Gros Piton, UNESCO World Heritage Site, and reflection in the swimming pool at Sugar Beach, St. Lucia, Windward Islands, West Indies, Caribbean, Central America
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
Licancabur volcano, San Pedro de Atacama, Chile, South America
Tabacon Hot Springs, volcanic hot springs fed from the Arenal Volcano, Arenal, Costa Rica, Central America
Solidified lava flows, El Misti volcano, 5821m, Arequipa, Peru, South America
Irazu volcano, Irazu Volcano National Park, Cartago Province, Costa Rica, Central America
Colourful springs of acid in Dallol, hottest place on earth, Danakil depression, Ethiopia, Africa
Volcanic cone over the vineyards of Lanzarote, Canary Islands, Spain, Atlantic, Europe
Part of the vast crater of 10023 ft Haleakala, the world's largest dormant volcano, seen from Sliding Sands trail, Maui, Hawaii, Hawaiian Islands, United States of America (U.S.A.), North America
Coffee plantations on the slopes of the Poas Volcano, near San Jose, Costa Rica, Central America
Mount Teide (Pico del Teide) from the east, Parque Nacional de Las Canadas del Teide (Teide National Park), Tenerife, Canary Islands, Spain, Europe
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
Lake Atitlan, Western Highlands, Guatemala, Central America
Looking across the old crater towards the smoking 2438m summit of the active volcano Mount Canison, Visayan island of Negros, Philippines, Southeast Asia, Asia
Vesuvius volcano from ruins of Forum buildings in Roman town, Pompeii, Campania, Italy, Europe
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
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
Bromo-Tengger-Semeru National Park at dawn, island of Java, Indonesia, Southeast Asia, Asia
Amed beach, island of Bali, Indonesia, Southeast Asia, Asia
Cacti, Stromboli Island, Eolian Islands (Aeolian Islands), UNESCO World Heritage Site, Italy, Mediterranean, Europe
Mount Damavand, Elburz Mountains, Iran, Middle East
Tabacon Hot Springs, volcanic hot springs fed from the Arenal Volcano, Arenal, 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
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
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
Krafla volcano near Lake Myvatn, Reykjahlid, Iceland, Polar Regions
View from Volcan Cotopaxi, 5897m, the highest active volcano in the world, Ecuador, South America
Lake Atitlan, Western Highlands, Guatemala, Central America
Horsemen on Mount Bromo volcano, Eastern Java, Indonesia, Southeast Asia, Asia
Steaming volcanic mud pools, Rincon de la Vieja National Park at foot of Rincon Volcano, Guanacaste, Costa Rica, Central America
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
Guides dipping twigs in molten sulphur at fumaroles in Papandayan Volcano, Garut, W Java, Java, Indonesia, Southeast Asia, Asia
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
Active mud flow from line of mud volcanoes, in the Firuze crater, Gobustan, Baku, Azerbaijan, Central Asia, Asia
Arenal volcano, La Fortuna, Costa Rica, Central America
Arenal volcano, La Fortuna, Costa Rica, Central America
Visitors at an active andesite stratovolcano on White Island, North Island, New Zealand, Pacific
Cattle grazing in a field with the Osorno volcano behind in the Lake District in Chile, South America
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 Fuji (3776m), cable car, Hakone, Honshu Island, Japan, Asia
Mount Batur volcano and lake at sunrise, Bali, Indonesia, Southeast Asia, Asia
Steam plume off boiling acid lake, Naka-dake active crater, Aso volcano, Kyushu, Japan, Asia
Coffee plantations on the slopes of the Poas Volcano, near San Jose, Costa Rica, Central America
Lake Shoji, with Mount Fuji behind, Shojiko, Central Honshu, Japan, Asia
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
Road leading to the Volcano of Piton de la Fournaise, La Reunion, Indian Ocean, Africa
Climbers on the glacier of Volcan Cotopaxi, 5897m, the highest active volcano in the world, Ecuador, South America
Cross on summit of El Misti volcano, 5822m, Arequipa, Peru, South America
Lava beds surround Snaefellsjokull, an active strato volcano capped in snow and ice, on the Snaefellsnes Peninsula, North West area, Iceland, Polar Regions
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
Dormant volcano, Mount Ngauruhoe, Tongariro National Park, UNESCO World Heritage Site, Taupo, South Auckland, North Island, New Zealand, Pacific
Atacama Desert and Volcan Licancabur, San Pedro de Atacama region, Chile, South 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
Motorhome below Mount Ngauruhoe with Kiwi crossing sign, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, South Pacific
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
Summit crater, Volcan Cotopaxi, 5897m, the highest active volcano in the world, Ecuador, South America
Volcano House, Cesar Manrique Foundation, Tahiche, Lanzarote, Canary Islands, Spain, Atlantic, Europe
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
Tabacon Hot Springs, volcanic hot springs fed from the Arenal Volcano, Arenal, 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
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
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
Saint Pierre Bay, with Mont Pele volcano, Martinique, West Indies, Caribbean, Central America
Tourist walking along rim of Gunung Bromo, Bromo-Tengger-Semeru National Park, Java, Indonesia, Southeast Asia, Asia
Volcano, Stromboli Island, Eolian Islands (Aeolian Islands), UNESCO World Heritage Site, Italy, Mediterranean, Europe
Hakone, Kanagawa prefecture, Japan, Asia
Sunrise on Mount Fuji from Lake Kawaguchi, Yamanashi Prefecture, Japan, Asia
Man walking on dry lake bed with Llaima Volcano in distance, Conguillio National Park, Chile, South America
Poas Volcano, Poas Volcano National Park, Costa Rica, Central America
Climbers on summit of El Misti volcano, 5822m, Arequipa, Peru, South America