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Oldonyo Lengai volcano, 2878m, Ngorongoro Conservation Area, UNESCO World Heritage Site, Tanzania, East Africa, Africa
Solidified lava flows, El Misti volcano, 5821m, Arequipa, Peru, South America
Eruption of Gunung Merapi, a highly active volcano near Yogyakarta, Java, Indonesia, Southeast Asia, Asia
Haleakala National Park, volcanic landscape and summit visitors center, Maui Island, Hawaii, United States of America, North America
Tourist walks round Masaya crater, Santiago crater, Park National Volcan Masaya, Masaya, Nicaragua, Central America
Santiago Crater, Park National Volcan Masaya, Masaya, Nicaragua, Central America
Volcanic landscape, Betancuria Natural Park, Fuerteventura, Canary islands, Spain, Europe
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
Meteor crater, the largest known in the world, Arizona, United States of America, North America
St. Pierre Bay, with Mont Pelee behind, scene of 1902 volcanic disaster, which killed 30,000 people, Martinique, Windward Islands, West Indies, Caribbean, Central America
Spectacular 600m volcanic cliffs of the Risco de Famara rising over Lanzarote's finest beach at Famara, with its low-rise bungalow development, Famara, Lanzarote, Canary Islands, Spain, Atlantic Ocean, Europe
Irregular blocky lava (a'a) and cinder cones of the volcanic landscape of Timanfaya National Park, Lanzarote, Canary Islands, Spain, Atlantic Ocean, Europe
Lava flows in lake Frostadavatn, Landmannalaugar area, Fjallabak region, Iceland, Polar Regions
Blahylur crater lake in the Landmannalaugar area,Tjorvafell, 843 m in the distance, Fjallabak region, Iceland, Polar Regions
Mount Krakatindur, 858 m, standing solitary in the Nyjahraun lava field, east of Hekla volcano in the distance, Fjallabak route north (Nyrdri-Fjallaback) in the interior, Iceland, Polar Regions
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
Crater lake of Volcan Santa Ana, 2365m, Parque Nacional Los Volcanes, El Salvador, Central America
Looking north to Lover's Bay with two Norfolk Island pines by the lagoon with the world's most southerly coral reef, on this 10km long ancient volcanic island in the Tasman Sea, Lord Howe Island, UNESCO World Heritage Site, New South Wales, Australia, Pacific
Eroded calcarenite rock (cemented coral sands) with Mount Lidgbird and Mount Gower by the lagoon with the world's most southerly coral reef, on this 10km long volcanic island in the Tasman Sea, Lord Howe Island, UNESCO World Heritage Site, New South Wales, Australia, Pacific Ocean.
Tourists walking on lava flow on Isla Santiago, Sullivan Bay, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Hot air balloons over volcanic landscape in the dawn sky above Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Eurasia
Hakone Ropeway over the volcanic cauldron, Owakudani, Hakone, Tokyo, Japan, Asia
Colourful springs of acid in Dallol, hottest place on earth, Danakil depression, Ethiopia, Africa
Colourful springs of acid in Dallol, hottest place on earth, Danakil depression, Ethiopia, Africa
Lava flow from the Piano del Lago cone destroying the cable car above Rifugio Sapienza on the south flank of Mount Etna during the 2001 eruptions, Sicily, Italy, Europe
Spirit Lake in the landscape north of Mount St. Helens devastated by the 1980 eruption, Mount St. Helens National Volcanic Monument, Washington State, United States of America (U.S.A.), North America
Laguna Verde with mineral flat margin and Volcan Licancabur, 5960m, Southwest Highlands, Bolivia, South America
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
Solidified lava flows, El Misti volcano, 5821m, Arequipa, Peru, South America
Valagja Gorge, a bright-coloured volcanic fissure north-east of Mount Hekla volcano, south Iceland (Sudurland), 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
Cacti, Stromboli Island, Eolian Islands (Aeolian Islands), UNESCO World Heritage Site, Italy, Mediterranean, Europe
Lava flow, Kilauea, Hawaii Volcanoes National Park, UNESCO World Heritage Site, Island of Hawaii (Big Island), Hawaii, United States of America, North 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
Christie's Hole, eroded volcanic rock coast of Papa Stour (Great Island of the Priests), Shetland Islands, Scotland, United Kingdom, Europe
Eshaness basalt cliffs, Calder's Geo, ancient volcanic crater, coast deeply eroded with caves, blowholes and stacks, Northmavine, Shetland Islands, Scotland, United Kingdom, Europe
Mount Teide (Pico del Teide) from the east, Parque Nacional de Las Canadas del Teide (Teide National Park), Tenerife, Canary Islands, Spain, Europe
Cloud in crater, Caldeira, Faial, Azores, Portugal, Europe
Tourists on walking tour, Isla Santa Cruz, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Road through volcanic landscape near Tiscamanita, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Licancabur volcano, San Pedro de Atacama, Chile, South America
Vine cultivation, La Geria region, Lanzarote, Canary Islands, Spain, Europe
Mount Damavand, Elburz Mountains, Iran, Middle East
Hikers near Emerald Lakes on the Tongariro Crossing, Tongariro National Park, UNESCO World Heritage Site, the oldest national park in New Zealand, Taupo Volcanic Zone, North Island, New Zealand, Pacific
Irazu volcano, Irazu Volcano National Park, Cartago Province, Costa Rica, Central 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
Amed beach, island of Bali, Indonesia, Southeast Asia, Asia
Darwin Crater, Tagus Cove, Isabella (Isla Isabela), Galapagos Islands, Ecuador, South America
Steam plume off boiling acid lake, Naka-dake active crater, Aso volcano, Kyushu, Japan, Asia
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
Russian truck stops at a viewpoint over the lava sand field of the Tolbachik volcano, Kamchatka, Russia, Eurasia
Cueva de Los Verdes, cave tourist attraction in lava pipe tunnel, Lanzarote, Canary Islands, Spain, Atlantic, Europe
View south from Kim's Lookout to Mount Lidgbird on the left and Mount Gower by the lagoon with the world's most southerly coral reef, on this 10km long volcanic island in the Tasman Sea, Lord Howe Island, UNESCO World Heritage Site, New South Wales, Australia, Pacific
Close-up of the limestone terraces formed by volcanic water depositing six inches of calcium carbonate a year, Mammoth Hot Springs and Terraces, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Aleutian islands, Alaska, United States of America, North America
Bromo-Tengger-Semeru National Park at dawn, island of Java, Indonesia, Southeast Asia, Asia
Rice paddy fields in centre of the island, Bali, Indonesia, Southeast Asia, Asia
Tabacon Hot Springs, volcanic hot springs fed from the Arenal Volcano, Arenal, Costa Rica, Central 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
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
Arenal volcano, La Fortuna, Costa Rica, Central America
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
Summit crater, Volcan Cotopaxi, 5897m, the highest active volcano in the world, Ecuador, 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
Dormant volcano, Mount Ngauruhoe, Tongariro National Park, UNESCO World Heritage Site, Taupo, South Auckland, North Island, New Zealand, Pacific
Punaluu Black Sand Beach, Island of Hawaii (Big Island), Hawaii, United States of America, Pacific, 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
Arenal volcano, La Fortuna, Costa Rica, Central America
Mount Lidgbird on the left and Mount Gower by the lagoon with the world's most southerly coral reef, on this 10km long volcanic island in the Tasman Sea, Lord Howe Island, UNESCO World Heritage Site, New South Wales, Australia, Pacific
Cattle grazing in a field with the Osorno volcano behind in the Lake District in Chile, South America
Landscape of volcanic hills looking to Taiaroa Head, Albatross, on the Otago Peninsula near Dunedin, South Island, New Zealand, Pacific
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
Hot water pools in this area of geothermal activity, Geysir, Iceland, Polar Regions
Eternal fire of the Chimera, Olympus, Turkey, Eurasia
Steaming volcanic mud pools, Rincon de la Vieja National Park at foot of Rincon Volcano, Guanacaste, Costa Rica, Central America
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
Active mud flow from line of mud volcanoes, in the Firuze crater, Gobustan, Baku, Azerbaijan, Central 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
South east coast from Dolomieu Crater, Piton de la Fournaise, Reunion, Indian Ocean, Africa
Ryan Lake and some of the millions of trees north of Mount St. Helens flattened by the eruption of 1980, Mount St. Helens National Volcanic Monument, Washington State, United States of America (U.S.A.), North America
Active summit craters, Mount Etna, UNESCO World Heritage Site, Catania, Sicily, Italy, Europe
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
A family walking 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
Clumps of thorn amid lava fields on northern slopes of Mount Etna, Sicily, Italy, Europe
Visitors at an active andesite stratovolcano on White Island, North Island, New Zealand, Pacific
Road leading to the Volcano of Piton de la Fournaise, La Reunion, Indian Ocean, Africa
Mount Teide, Tenerife, Canary Islands, Spain, Atlantic, Europe
Volcano, Stromboli Island, Eolian Islands (Aeolian Islands), UNESCO World Heritage Site, Italy, Mediterranean, Europe
Colourful volcanic landscape, Tupiza, Southern Altiplano, Bolivia, 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
Pohutu Geyser at Te Puia Wakarewarewa Geothermal Village, Rotorua, Taupo Volcanic Zone, North Island, New Zealand, Pacific
Outer crater and the small scoria cone, Formica leo, Piton de la Fournaise, Reunion, Africa
Arenal volcano, La Fortuna, Costa Rica, Central America
Aerial view of Honolulu, Waikiki and Diamond Head, Oahu, Hawaii, United States of America, Pacific, North America
Tourist walking along rim of Gunung Bromo, Bromo-Tengger-Semeru National Park, Java, Indonesia, Southeast Asia, Asia
Volcanic rocks and sea, Parque Nacional de Timanfaya, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Erosion with volcanic tuff pillars, Pasabagi, near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
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