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Lava lake in the caldera of the Ambrym volcano, Vanuatu, Pacific
Smoking Ambrym volcano, Vanuatu, Pacific
Smoking Ambrym volcano, Vanuatu, Pacific
Smoking Ambrym volcano, Vanuatu, Pacific
Crater of Rano Kau Volcano at sunset, Easter Island, Chile, South America
Crater of Rano Kau Volcano at sunset, Easter Island, Chile, South America
Khorgo volcano crater and White Lake in the background, Tariat district, North Hangay province, Mongolia, Central Asia, Asia
Flat top acacia trees (Vachellia abyssinica) along a road leading to the Ngorongoro Crater, Tanzania, East Africa, Africa
Water buffalo around a safari vehicle in the Ngorongoro Crater, UNESCO World Heritage Site, Tanzania, East Africa, Africa
View from the Mount Pico, Pico Island, Azores, Portugal, Atlantic, Europe
Bingham Canyon Copper Mine, Salt Lake City, Utah, United States of America, North America
Main open-pit copper-sulphur mine at Rio Tinto, Huelva, Southwest Spain, Europe
Tourist jeeps on safari at sunrise, Ngorongoro Crater Conservation Area, UNESCO World Heritage Site, Tanzania, East Africa, Africa
Sunrise, Ngorongoro Crater Conservation Area, UNESCO World Heritage Site, Tanzania, East Africa, Africa
Lion (Panthera leo), Ngorongoro Crater Conservation Area, UNESCO World Heritage Site, Tanzania, East Africa, Africa
Cattle egret (Bubulcus ibis) and hippo (Hippopotamus amphibius) at a water hole, Ngorongoro Crater, UNESCO World Heritage Site, Tanzania, East Africa, Africa
Inside the crater on the top of Mount Kilimanjaro with the highest point Uhuru Peak at the end of the ridge, UNESCO World Heritage Site, Tanzania, East Africa, Africa
View over the Sete Cidades crater, Island of Sao Miguel, Azores, Portugal, Atlantic, Europe
Panorama of the western Bonito Lava Field at Sunset Crater Volcano, Arizona, United States of America, North America
Super Pan view of the Cinder Hills on left and the eastside of Sunset Crater on the right, near Flagstaff, Arizona, United States of America, North America
Lesser flamingos (Phoenicopterus minor) feeding on crater lake, Tanzania, East Africa, Africa
Cape buffalo (Syncerus caffer) grazing in the Ngorongoro Crater, UNESCO World Heritage Site, Tanzania, East Africa, Africa
Lioness (Panthera leo), Ngorongoro crater, Ngorongoro Conservation Area, UNESCO World Heritage Site, Tanzania, East Africa, Africa
Wizard Island in Crater Lake, the deepest lake in the United States, Crater Lake National Park, Oregon, United States of America, North America
Aerial view of Ngorongoro Crater in the Ngorongoro Conservation Area, UNESCO World Heritage Site, Tanzania, East Africa, Africa
Aerial view of Ngorongoro Crater in the Ngorongoro Conservation Area, UNESCO World Heritage Site, Tanzania, East Africa, Africa
Exploring a volcanic landscape on a footpath up Saxholl cinder cone and crater, Snaefellsjokull National Park, western Iceland, Polar Regions
Majestic crater of Hondo volcano (Calderon Hondo) with the ocean in background, Corralejo, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Panoramic view, crater of Blue Lake and Tongariro Volcano at sunrise, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Orongo Crater, Rano Kau, Rapa Nui National Park, UNESCO World Heritage Site, Easter Island (Isla de Pascua), Chile, South America
Orongo Crater, Rano Kau, Rapa Nui National Park, UNESCO World Heritage Site, Easter Island (Isla de Pascua), Chile, South America
A view of the volcanic crater of Cova de Paul on Santo Antao Island, Cape Verde, Africa
Tourists on Volcan Poas, the Active Crater of 2704m set in it's own National Park, Alajuela Province, Costa Rica
Burned trees on a Volcanic cinder rim in Coconino National Forest near Sunset Crater National Monument of Arizona.
The southeast summit of O'Leary Peak viewed from a volcanic ridge in Coconino National Forest near Sunset Crater National Monument of Arizona.
Aerial view of Vesuvius crater and Sorrento peninsula at sunrise, Naples, Campania, Italy, Europe
February 23, 2013 - Powerful night time explosive eruption of Sakurajima volcano, Japan. Trajectories of glowing incandescent volcanic bombs are visible. Static lightning discharges are visible at top of picture.
December 3, 2012 - Colourful crater lakes of Kelimutu volcano, Flores Island, Indonesia. Tiwu Nua Muri Koo Fai (Lake of Young Men and Maidens) and Tiwu Ata Polo (Bewitched Lake). The two lakes are highly acidic due to underwater fumarole activity and are turqoise in colour.
January 30, 2011 - Lava lake illuminating walls of pit crater at nightfall, Erta Ale volcano, Danakil Depression, Ethiopia.
January 27, 2011 - Dallol geothermal area, potassium salt deposits formed by brine hot springs, Danakil Depression, Ethiopia.
January 27, 2011 - Dallol geothermal area, potassium salt deposits formed by brine hot springs, Danakil Depression, Ethiopia.
View from below the rim of the giant sinkhole known as Johnson Crater in the Kaibab National Forest near Ash Fork Arizona, USA
View from below the rim of the giant sinkhole known as Johnson Crater in the Kaibab National Forest near Ash Fork Arizona, USA
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
A view of the boiling mud at Namafjall, Iceland
Lion (Panthera Leo) female and cub, Ngorongoro Crater, Tanzania, East Africa, Africa
A grey crowned crane (Balearica regulorum) in the Ngorongoro Crater, Tanzania, East Africa, Africa
Japanese warning sign on the Crater rim of Mount Naka, an active volcano, Mount Aso, Kyushu, Japan, Asia
Aerial of the volcanic crater with Lake Mazafim, island of Annobon, Equatorial Guinea, Africa
Road across a volcanic crater, with small buildings in the distance, inland on the island of Sao Vicente, Republic of Cape Verde Islands, Atlantic, Africa
A water catchment to help local wildlife in the Coconino National Forest just outside Sunset Crater National Monument Arizona.
Volcanic cinder hill in Coconino National Forest near Sunset Crater National Monument of Arizona with a pine tree backlit by the sun.
Lava and ash floes in the Galapagos Islands Archipelago, UNESCO World Heritage Site, Ecuador, South America
Makhtesh Ramon is a geological landform,commonly known as 'crater' but more accurately described as erosion cirque,Negev,Israel,Middle East,Western Asia
Makhtesh Ramon is a geological landform,commonly known as 'crater' but more accurately described as erosion cirque,Negev,Israel,Middle East,Western Asia
Humphrey's Peak viewed from a volcanic ridge in Coconino National Forest near Sunset Crater National Monument of Arizona.
Aerial view of the crater of Volcan de la Corona at sunrise, Haria, Las Palmas, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Volcanic cinder hills in Coconino National Forest near Sunset Crater National Monument of Arizona.
The boundary fence between Coconino National Forest and Sunset Crater National Monument of Arizona.
Lake inside a crater, Iceland.
February 23, 2013 - Powerful night time explosive eruption of Sakurajima volcano, Japan. Trajectories of glowing incandescent volcanic bombs are visible.
December 3, 2012 - Colourful crater lakes of Kelimutu volcano, Flores Island, Indonesia. Tiwu Nua Muri Kofah (Lake of Young Men and Maidens) and Tiwu Ata Polo (Bewitched Lake). The two lakes are highly acidic due to underwater fumarole activity and are turqoise in colour.
December 3, 2012 - Colourful crater lakes of Kelimutu volcano, Flores Island, Indonesia. A crater wall separates Tiwu Nua Muri Koo Fai (Lake of Young Men and Maidens) and Tiwu Ata Polo (Bewitched Lake). The two lakes are highly acidic due to underwater fumarole activity and are turqoise in colour.
January 24, 2012 - Lava in crater glowing during blue hour on Nyamuragira Volcano, Kimanura Eruption.
January 22, 2012 - Glowing lava in crater illuminating gas cloud above Nyamuragira Volcano, Kimanura Eruption.
January 22, 2012 - Bush silhouetted against glow of lava in crater of Nyamuragira Volcano, Kimanura Eruption.
November 2007 - Aerial view of crater lake in Tongariro volcanic complex, New Zealand.
November 2007 - Snow-covered Ngauruhoe cone, Mount Tongariro volcano, New Zealand.
November 2007 - Aerial view of 1886 basaltic plinian eruption fissure in rhyolite dome complex, Mount Tarawera volcano, New Zealand.
November 2007 - Aerial view of 1886 basaltic plinian eruption fissure in rhyolite dome complex, Mount Tarawera volcano, New Zealand.
November 2007 - Aerial view of White Island (Whakaari) volcano with central acidic crater lake, Bay of Plenty, New Zealand.
January 21, 2011 - Active lava lake in pit crater, Nyiragongo Volcano, Democratic Republic of the Congo.
January 21, 2011 - Nighttime view of lava lake in pit crater, Nyiragongo Volcano, Democratic Republic of the Congo.
January 21, 2011 - Nighttime view of lava lake in pit crater, Nyiragongo Volcano, Democratic Republic of the Congo.
May 20, 2008 - Lava bomb trajectories visible during nighttime vulcanian eruption of Anak Krakatau volcano, Sunda Strait, Java, Indonesia.
February 10, 2008 - Dallol geothermal area, brine hot springs, Danakil Depression, Ethiopia.
January 30, 2011 - Lava lake illuminating walls of pit crater at nightfall, Erta Ale volcano, Danakil Depression, Ethiopia.
January 27, 2011 - Dallol geothermal area, potassium salt deposits formed by brine hot springs, Danakil Depression, Ethiopia.
January 27, 2011 - Dallol geothermal area, potassium salt deposits formed by brine hot springs, Danakil Depression, Ethiopia.
January 27, 2011 - Dallol geothermal area, potassium salt deposits formed by brine hot springs, Danakil Depression, Ethiopia.
January 27, 2011 - Dallol geothermal area, terraces, potassium salt deposits formed by brine hot springs, Danakil Depression, Ethiopia.
January 27, 2011 - Dallol geothermal area, potassium salt deposits formed by brine hot springs, Danakil Depression, Ethiopia.
Spotted hyena (spotted hyaena) (Crocuta crocuta), Ngorongoro Crater, Tanzania, East Africa, Africa
Adult African crowned crane (Balearica regulorum), Ngorongoro Crater, Tanzania, East Africa, Africa
View from below the rim of the giant sinkhole known as Johnson Crater in the Kaibab National Forest near Ash Fork Arizona, USA
View from below the rim of the giant sinkhole known as Johnson Crater in the Kaibab National Forest near Ash Fork Arizona, USA
Super Panorama of the giant sinkhole known as Johnson Crater in the Kaibab National Forest near Ash Fork Arizona, USA
The giant sinkhole known as Johnson Crater in the Kaibab National Forest near Ash Fork Arizona, USA
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad