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Splashes of sulphur colouring Stefanos crater ground, Nisyros Island, Dodecanese Islands, Greece
Third crater, created in 1994 and containing green lake, Irazu Volcano, Parque Nacional Volcan Irazu, Cartago, Costa Rica, Central America
Gorely volcano, tundra plants on slopes, summit crater rims on skyline, Kamchatka, East Siberia, Russia
Koryaksky volcano seen beyond walkers on crater rim of Avacha volcano, Kamchatka, East Siberia, Russia
Malyi Semyachik volcano, acid lake inside summit crater, Kamchatka, East Siberia, Russia
Steam plume from active vent beside crater lake, Volcan Poas, Cordillera Central, Costa Rica, Central America
Late winter hikers on snowfield in South Crater on Tongariro Crossing, Tongariro National Park, UNESCO World Heritage Site, South Auckland, North Island, New Zealand, Pacific
Crater Lake and Wizard Island at dawn, Crater Lake National Park, Oregon, United States of America, North America
Aerial of a tuquoise crater lake on top of Mount Ruapehu, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Sulphur crystals on fumarole at Papandayan Volcano an active four crater caldera, Garut, West Java, Java, Indonesia, Southeast Asia, Asia
Sulphur encrusted fumarole at Papandayan Volcano, an active four crater caldera, Garut, West Java, Java, Indonesia, Southeast Asia, Asia
Green crater lake and steaming fumaroles at Papandayan Volcano, an active four cratered caldera, Garut, West Java, Java, Indonesia, Southeast Asia, Asia
Mineral stained pond on collapsed flank of Papandayan Volcano, an active four crater caldera, Garut, West Java, Java, Indonesia, Southeast Asia, Asia
Fagrifoss waterfall on the slopes of Laki crater, Lakagigar, highlands region, Iceland, Polar Regions
Glowing active volcanic crater of Volcan Telica on a starry night, with the Milky Way, Orion and the Pleiades, Leon, Nicaragua, Central America
Female tourist on boardwalk by the Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Smoke rises from the active crater of Tungurahua Volcano that threatens the nearby town of Banos, Ambato Province, Central Highlands, Ecuador, South America
Cape buffalo (African buffalo) (Syncerus caffer) with a red-billed oxpecker (Buphagus erythrorhynchus), Ngorongoro Crater, Ngorongoro Conservation Area, Tanzania,East Africa,Africa
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
Shores of Lake Myvatn at dusk, fine pseudo-crater in the distance, near Skutustadir, Myvatn, northern area, Iceland, Polar Regions
Santiago crater, Park National Volcan Masaya, Masaya, Nicaragua, Central America
Aerial view of Mount Visoke (Mount Bisoke), an extinct volcano straddling the border of Rwanda and Democratic Republic of the Congo (DRC) showing crater lake, with Mount Mikeno in background, Virunga Volcanoes, Great Rift Valley, Africa
Male Thomson's gazelle (Gazella thomsonii), Ngorongoro Crater, Tanzania, East Africa, Africa
Spotted Hyena or Spotted Hyaena (Crocuta crocuta) at a Cape Buffalo kill, Ngorongoro Crater, Tanzania
Lava flowing down mountain from Eyjafjallajokull volcano, Iceland, Polar Regions
Cape buffalo (African buffalo) (Syncerus caffer) and two yellow-billed oxpeckers (Buphagus africanus), Ngorongoro Crater, Tanzania, East Africa, Africa
Cape Buffalo (African buffalo) (Syncerus caffer), white-naped raven (white-necked raven) (Corvus albicollis) and a yellow-billed oxpecker (Buphagus africanus), Ngorongoro Crater, Tanzania, East Africa, Africa
Hverfjall volcano crater at sunset, Myvatn, Iceland, Polar Regions
Crateri Silvestri, high angle view, Etna, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
View of lava fields and snow-capped peaks in the distance, Etna, Sicily, Italy, Mediterranean, Europe
People walking around Stefanos crater moonlike landscape, Nisyros Island, Dodecanese Islands, Greece
People walking around Stefanos crater moonlike landscape, Nisyros Island, Dodecanese Islands, Greece
Acid Crater Lake, White Island Volcano, an active volcano in the Bay of Plenty, North Island, New Zealand, Pacific
Common eland (Taurotragus oryx), Ngorongoro Crater, Tanzania, East Africa, Africa
Crowned plover (crowned lapwing) (Vanellus coronatus), Ngorongoro Crater, Tanzania, East Africa, Africa
Male saddle-billed stork (Ephippiorhynchus senegalensis), Ngorongoro Crater, Tanzania, East Africa, Africa
Kawah Ijen and its turquoise acid crater lake, Java, Indonesia, Southeast Asia, Asia
Glowing active volcanic crater of Volcan Telica at night with star trails and shooting star (meteor) on right, Leon, Nicaragua, Central America
Sulphur worker appearing out of toxic fumes at Kawah Ijen, East Java, Indonesia, Southeast Asia, Asia
Sulphur worker mining sulphur at the bottom of the crater, Kawah Ijen, Java, Indonesia, Southeast Asia, Asia
Bromo volcano crater on Java, Indonesia, Southeast Asia, Asia
Rice terraces on the slope of the Kawah Ijen (Ijen crater), Banyuwangi, East Java, Indonesia, Southeast Asia, Asia
Crater of Poas Volcano in Poas Volcano National Park, in the Cordillera Central mountain range of Costa Rica, Central America
Lion (Panthera leo) female grooming a cub, Ngorongoro Crater, Tanzania, East Africa, Africa
Landscape of the Caldeirao do Corvo, Corvo, Azores, Portugal, Atlantic, Europe
Red-billed oxpecker (Buphagus erythrorhynchus), Ngorongoro Crater, Tanzania, East Africa, Africa
Lioness (Panthera leo), Ngorongoro Crater, Tanzania, East Africa, Africa
African lion in shadow (Leo panthera), Ngorongoro Crater, Tanzania, East Africa, Africa
Secretarybird (Sagittarius serpentarius), Ngorongoro Crater, Tanzania, East Africa, Africa
Caracal (Caracal caracal) with a young Thomson's Gazelle (Gazella thomsonii), Ngorongoro Crater, Tanzania, East Africa, Africa
Warthog (Phacochoerus aethiopicus) mud bathing, Ngorongoro Crater, Tanzania, East Africa, Africa
Warthog (Phacochoerus aethiopicus) adult and piglet, Ngorongoro Crater, Tanzania, East Africa, Africa
Red-billed oxpecker (Buphagus erythrorhynchus) on a Cape buffalo (Syncerus caffer), Ngorongoro Crater, Tanzania, East Africa, Africa
African elephant (Loxodonta africana) bull, Ngorongoro Crater, Tanzania, East Africa, Africa
Common zebra (plains zebra) (Burchell's zebra) (Equus burchelli) mare and just-born foal, Ngorongoro Crater, Tanzania, East Africa, Africa
Secretarybird (Sagittarius serpentarius), Ngorongoro Crater, Tanzania, East Africa, Africa
African elephant (Loxodonta africana) bull, Ngorongoro Crater, Tanzania, East Africa, Africa
Vervet monkey (Chlorocebus aethiops) mother nursing her infant, Ngorongoro Crater, Tanzania, East Africa, Africa
Lion (Panthera leo) cub and its mother, Ngorongoro Crater, Tanzania, East Africa, Africa
Tourists on a game drive and a lion (Panthera leo), Ngorongoro Crater, UNESCO World Heritage Site, Tanzania, East Africa, Africa
Aerial view of Hnausapollur (Blahylur), a volcanic crater near Landmannalaugar, Fjallabak Nature Reserve, Southern Region, Iceland, Polar Regions
Hikers on rim of old crater, Avacha volcano, Kamchatka, East Siberia, Russia
Sulphur encrusted fumaroles at Papandayan Volcano, an active four crater caldera, Garut, West Java, Java, Indonesia, Southeast Asia, Asia
Glowing active 700m wide volcanic crater of Volcan Telica with lava vents far below, in the North West volcanic chain, Leon, Nicaragua, Central America
Summit of active Volcan San Cristobal, 1745m, in the North West volcano chain, the country's highest volcano, Chinandega, Nicaragua, Central America
Saddle-billed stork (Ephippiorhynchus senegalensis), Ngorongoro Crater, Tanzania, East Africa, Africa
Grey crowned crane (Southern crowned crane) (Balearica regulorum), Ngorongoro Crater, Tanzania, East Africa, Africa
Steam plume from rising dome within crater, Mount St. Helens, Washington state, United States of America, North America
Young vervet monkey (Chlorocebus aethiops) climbing a tree, Ngorongoro Crater, Tanzania, East Africa, Africa
Crater of Poas Volcano in Poas Volcano National Park, in the Cordillera Central mountain range of Costa Rica, Central America
Backlit image of workers loaded with sulphur pieces cut out from a sulphur mine on Ijen crater lake, Java, Indonesia, Southeast Asia, Asia
Smoking 700m wide crater of Volcan Telica in the North West volcano chain, one of the country's most active volcanoes, Leon, Nicaragua, Central America
Grey crowned crane (Southern crowned crane) (Balearica regulorum) pair in flight, Ngorongoro Crater, Tanzania, East Africa, Africa
Two black rhinoceros (hook-lipped rhinoceros) (Diceros bicornis), Ngorongoro Crater, UNESCO World Heritage Site, Tanzania, East Africa, Africa
Lion (Panthera leo) female and three cubs, Ngorongoro Crater, Tanzania, East Africa, Africa
Coke's hartebeest (Alcelaphus buselaphus cokii), Ngorongoro Crater, Tanzania, East Africa, Africa
Japanese warning sign on the crater rim of Mount Naka active volcano, Mount Aso, Kyushu, Japan, Asia
Black kite (Milvus migrans), Ngorongoro Crater, Tanzania, East Africa, Africa
Lion (Panthera leo), two cubs playing with their mother, Ngorongoro Crater, Tanzania, East Africa, Africa
Penstemon flowers, Mount St. Helens, Mount St. Helens National Volcanic Monument, Washington state, United States of America, North America
Fumaroles on collapsed side of Papandayan Volcano, an active four crater caldera, Garut, West Java, Java, Indonesia, Southeast Asia, Asia
Thomson's gazelle (Gazella thomsonii) mother and young, Ngorongoro Crater, Tanzania, East Africa, Africa
African hoopoe (Upupa africana) with its crest erected, Ngorongoro Crater, Tanzania, East Africa, Africa
Lava flowing down mountain from Eyjafjallajokull volcano, Iceland, Polar Regions
Rocky volcanic badlands (malpais) landscape, Malpais Grande National Park, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Malpais badlands volcanic landscape looking northeast from Los Hervideros, Parque Natural Los Volcanes, near Yaiza, Lanzarote, Canary islands, Spain, Atlantic, Europe
African pipit (grassland pipit) (grassveld pipit) (Anthus cinnamomeus) with a grasshopper, Ngorongoro Crater, Tanzania, East Africa, Africa
Geologists taking mineral samples on Gran Cratere (The Great Crater), Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe
Blue wildebeest (brindled gnu) (Connochaetes taurinus) calf, Ngorongoro Crater, Tanzania, East Africa, Africa
The very acid Ijen crater lake in the Ijen Volcano, Java, Indonesia, Southeast Asia, Asia
Spotted Hyena or Spotted Hyaena (Crocuta crocuta) with a Cape Buffalo skull, Ngorongoro Crater, Tanzania
Haleakala Crater, in Haleakala National Park, Maui's dormant volcano, Hawaii, United States of America, Pacific, North America
Volcano crater and black volcanic farmland soil, near Tinajo, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Wahban Crater (caldera) in Hejaz Mountains northeast of Jeddah, Saudi Arabia, Middle East
Sulphur encrusted fumaroles at Papandayan Volcano, an active four crater caldera, Garut, West Java, Java, Indonesia, Southeast Asia, Asia
Sunrise over Crater Lake and Wizard Island, Crater Lake National Park, Oregon, United States of America, North America
Rock formations against a clear blue sky with mountains in the background, showcasing natural erosion and geological features in the Teide National Park,UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic, Europe
Kawah Ijen volcano slope (Ijen crater), Banyuwangi, East Java, Indonesia, Southeast Asia, Asia
Caracal (Caracal caracal), Ngorongoro Crater, Tanzania, East Africa, Africa