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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
Hikers on rim of old crater, Avacha volcano, 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
Mineral stained pond on collapsed flank of Papandayan Volcano, an active four crater caldera, Garut, West Java, Java, Indonesia, Southeast Asia, Asia
Smoke rises from the active crater of Tungurahua Volcano that threatens the nearby town of Banos, Ambato Province, Central Highlands, Ecuador, South America
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
Hverfjall volcano crater at sunset, Myvatn, Iceland, Polar Regions
Malpais badlands volcanic landscape looking northeast from Los Hervideros, Parque Natural Los Volcanes, near Yaiza, Lanzarote, Canary islands, Spain, Atlantic, Europe
Volcanic landscape of solidified lava flows and distant cone volcanoes, near Yaiza, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Volcanic landscape, Mount Pico Partido, Parque Nacional de Timanfaya, national park, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Sulphur worker appearing out of toxic fumes at Kawah Ijen, 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
Crater of Poas Volcano in Poas Volcano National Park, in the Cordillera Central mountain range of Costa Rica, Central America
Landscape of the Caldeirao do Corvo, Corvo, Azores, Portugal, Atlantic, Europe
Aerial view of Hnausapollur (Blahylur), a volcanic crater near Landmannalaugar, Fjallabak Nature Reserve, Southern Region, Iceland, Polar Regions
Haleakala Crater, in Haleakala National Park, Maui's dormant volcano, Hawaii, United States of America, Pacific, North America
Japanese warning sign on the crater rim of Mount Naka active volcano, Mount Aso, Kyushu, Japan, Asia
Volcano crater and black volcanic farmland soil, near Tinajo, Lanzarote, Canary Islands, Spain, Atlantic, Europe
People walking around Stefanos crater moonlike landscape, Nisyros Island, Dodecanese Islands, Greek Islands, Greece, Europe
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
Rocky volcanic badlands (malpais) landscape, Malpais Grande National Park, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
View of lava fields and snow-capped peaks in the distance, Etna, Sicily, Italy, Mediterranean, Europe
Volcanic landscape with rocky terrain in the foreground and a clear blue sky over the ocean in the background in Tenerife, Canary Islands, Spain, Atlantic, Europe
Wahban Crater (caldera) in Hejaz Mountains northeast of Jeddah, Saudi Arabia, Middle East
Malpais badlands volcanic landscape Montana Negra and Caldera Colorada, Parque Natural Los Volcanes, Masdache, Lanzarote, Canary islands, Spain, Atlantic, Europe
People walking around Stefanos crater moonlike landscape, Nisyros Island, Dodecanese Islands, Greek Islands, Greece, Europe
Splashes of sulphur colouring Stefanos crater ground, Nisyros Island, Dodecanese Islands, Greek Islands, Greece, Europe
Road leading to cone of Mount Corona volcano and Ye village, Haria, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Penstemon flowers, Mount St. Helens, Mount St. Helens National Volcanic Monument, Washington state, United States of America, North America
Rice terraces on eastern shore of crater lake, Lake Maninjau, West Sumatra, Sumatra, Indonesia, Southeast Asia, Asia
Fumaroles on collapsed side of 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
Crater of Mount Eden with city beyond, Auckland, Central Auckland, North Island, New Zealand, Pacific
Low clouds glowing orange at sunrise, Crater Lake National Park, Oregon, United States of America, North America
The crater of the active Masaya volcano in Nicaragua, Central America
Volcanic crater (rano), Rano Kau, Easter Island, Chile
Crater Lake National Park, Oregon, USA
Scenic view of a tranquil volcanic landscape with clear blue sky in Tenerife, Canary Islands, Spain, Atlantic, Europe
Desert road stretching into the distance with rocky mountains under a clear blue sky in Tenerife, Canary Islands, Spain, Atlantic, Europe
Sunset at Crater Lake with Wizard Island, Crater Lake National Park, Oregon, United States of America, North America
Solfatara, volcanic crater with active fumaroles, Pozzuoli, Naples, Campania, Italy, Europe
Smoke plume rising over glacier, Eyjafjallajokull volcano, Iceland, Polar Regions
Geologists taking mineral samples on Gran Cratere (The Great Crater), Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe
Aerial of Lalolalo lake volcanic crater lake, center of Wallis, Wallis and Futuna, South Pacific, Pacific
The Blue Lake, a natural reservoir and one of three crater lakes at the top of Mt Gambier, an extinct volcano and town in the south east of the state, South Australia, Australia
View of the 300 meter deep crater called Viti off the north coast of Iceland, Polar Regions
Cruise ship anchoring in the volcanic crater of Deception Island, South Shetland Islands, Antarctica, Polar Regions
Crater rim on Mount Naka active volcano, Mount Aso, Kyushu, Japan, Asia
Tourists swimming in hot pools and waterfalls on Mount Rinjani volcano crater, Lombok, Indonesia, Southeast Asia, Asia
Tourist walking around the crater rim at the 3726m summit of Mount Rinjani volcano, Lombok, Indonesia, Southeast Asia, Asia
Wildlife, mossy trees, clouds and salt lake, Ngorongoro Crater, Ngorongoro Conservation Area, Tanzania, East Africa, Africa
Poas Volcano, Poas National Park, Costa Rica
Crater lake Viti in winter, on Krafla volcano, Krafla geothermal area near Lake Myvatn, north Iceland, Iceland, Polar Regions
Cruise ship anchoring in the volcanic crater of Deception Island, South Shetland Islands, Antarctica, Polar Regions
Avacha volcano, lava plug formed in crater in 1991, Koryaksky volcano beyond, Kamchatka, East Siberia, Russia
Tourists looking at the Volcano crater at Deception Island, South Shetland Islands, Antarctica, Polar Regions
Crater at the top of Sibayak Volcano, an active volcano at Berastagi (Brastagi), North Sumatra, Indonesia, Southeast Asia, Asia
Mount Naka active crater lake, Mount Aso, Kyushu, Japan, Asia
Mount Naka active crater lake, Mount Aso, Kyushu, Japan, Asia
Man fishing in front of Mount Baru Jari, Segara Anak Lake at the bottom of Mount Rinjani volcano crater, Lombok, Indonesia, Southeast Asia, Asia
Landscape of the Caldeirao do Corvo, Corvo, Azores, Portugal, Atlantic, Europe
Hverfell (Hverfjall) ash crater in north of the country, Myvatyn (Myvatn) Nature Reserve, Iceland
Penstemon flowers, Mount St. Helens, Mount St. Helens National Volcanic Monument, Washington state, United States of America, North America
Quilotoa Loop, volcanic crater lake, Ecuador, South America
The crater with active lava lake of Mount Nyiragongo, Virunga National Park, UNESCO World Heritage Site, Democratic Republic of the Congo, Africa
Mount Naka active crater lake, Mount Aso, Kyushu, Japan, Asia
Cruise ship anchoring in the volcanic crater of Deception Island, South Shetland Islands, Antarctica, Polar Regions
Coloured rocks at the volcanic crater, Deception Island, South Shetland Islands, Antarctica, Polar Regions
Volcanic ash (tephra) crater Hverfjall (Hverfell), 140m deep, more than 1 km across, at Myvatn, northern Iceland, Iceland, Polar Regions
Mount Naka active crater lake, Mount Aso, Kyushu, Japan, Asia
Sulphur basket, Kawah Ijen crater, Java, Indonesia, Southeast Asia, Asia
Volcanic crater and moss-covered lava fields on the Snaefellsness Peninsula, Iceland, Polar Regions
Mt Ngauruhoe volcano, beyond Red Crater, in the Tongariro National Park, Taupo, North Island, New Zealand
Shores of Lake Myvatn at dusk, fine pseudo-crater in the distance, near Skutustadir, Myvatn, northern area, Iceland, Polar Regions
Kerid explosion crater with lake of green water, near Reykjavik, Iceland, Polar Regions
Summit craters of Mount Etna, UNESCO World Heritage Site, Catania, Sicily, Italy, Europe
Crater rim on Mount Naka active volcano, Mount Aso, Kyushu, Japan, Asia
Aerial view of the crater of Piton de la Fournaise volcano, La Reunion, Indian Ocean, Africa
Kawah Ijen's acidic turquoise blue crater lake, Java, Indonesia, Southeast Asia, Asia
Mount St. Helens, Mount St. Helens National Volcanic Monument, Washington state, United States of America, North America
Reaching the crater rim of Mount Etna, UNESCO World Heritage Site, Catania, Sicily, Italy, Europe
Hiking in Diamond Head State Monument (Leahi Crater), Honolulu, Oahu, Hawaii, United States of America, Pacific
Rano Kau, Easter Island (Rapa Nui), Chile, South America
Volcano crater at Deception Island, South Shetland Islands, Antarctica, Polar Regions
Summit craters, Mount Etna, UNESCO World Heritage Site, Catania, Sicily, Italy, Europe
The Makhtesh Ramon crater, Negev, Israel, Middle East
The crater of Cilaos, La Reunion, Indian Ocean, Africa
Crater of Ksudach Volcano, Kamchatka, Russia, Eurasia
Volcanoes in Timanfaya National Park, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Aerial view, Volcano in Parque Natural de los Volcanes, Timanfaya, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Caldera Roja Volcano in Timanfaya National Park, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Lava flowing down mountain, Eyjafjallajokull volcano, Iceland, Polar Regions
Aerial view of Vesuvius crater and Gulf of Naples at sunrise, Naples, Campania, Italy, Europe
Hot volcanic steam rising into monsoon clouds from Kawah Ratu (Queen's Crater) of Mount Tangkuban, Perahu, Bandung, Java, Indonesia, Southeast Asia, Asia
Hot volcanic steam rising into monsoon clouds from Kawah Ratu (Queen's Crater) of Mount Tangkuban, Perahu, Bandung, Java, Indonesia, Southeast Asia, Asia