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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
Majestic crater of Hondo volcano (Calderon Hondo) with the ocean in background, Corralejo, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
People walking on the edge of the crater of Mount Vesuvius, Province of Naples, Campania region, Italy, Europe
Lava lake in the caldera of the Ambrym volcano, Vanuatu, Pacific
Smoking Ambrym volcano, Vanuatu, Pacific
Emerald lake on volcano slope, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Tourists on Volcan Poas, the Active Crater of 2704m set in it's own National Park, Alajuela Province, Costa Rica
Lava flowing down mountain, Eyjafjallajokull volcano, Iceland, Polar Regions
Crater of Rano Kau Volcano at sunset, Easter Island, Chile, South America
People walking on the edge of the crater of Mount Vesuvius, Province of Naples, Campania region, Italy, Europe
Mounts Lokon on the left, and Empung, with Tompaluan active crater on the saddle between, two volcanoes near Tomohon city, Gunung Lokon, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia
Panoramic view, crater of Blue Lake and Tongariro Volcano at sunrise, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Emerald Lakes at sunrise, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Emerald Lake in Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Aerial view, Volcano in Parque Natural de los Volcanes, Timanfaya, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Red Crater and Mount Ngauruhoe in Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Emerald Lakes at sunrise, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Close up of turquoise, vibrant Emerald Lake with steaming volcano, Tongariro Crossing, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Caldera Roja Volcano in Timanfaya National Park, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Panorama of the western Bonito Lava Field at Sunset Crater Volcano, Arizona, United States of America, North America
Sulphurous fumaroles and volcanic strata in Tompaluan active crater on the flank of Mount Lokon, a volcano near Tomohon city, Gunung Lokon, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia Indonesia
Sunrise at the volcano slopes Red Crater, Tongariror Crossing, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Panoramic aerial view of sunset over the active Erta Ale volcano crater, Danakil Depression, Afar Region, Ethiopia, Africa
Gran Cratere (The Great Crater) and Aeolian Islands view, Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, north of Sicily, Italy, Mediterranean, Europe
Steaming fumaroles, sulphur and volcanic strata in Tompaluan active crater by Mount Lokon volcano near Tomohon city, Gunung Lokon, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia
View along the slope and hiking trail up towards the Red Crater Volcano, on Tongariro Alpine Crossing, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Shore of the Emerald Lake, natural vibrant colour gradient with view on the Red Crater Volcano of Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Fountaining lava from Eyjafjallajokull volcano, Iceland, Polar Regions
People walking through fumaroles on Volcano Gran crater rim, Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, north of Sicily, Italy, Mediterranean, Europe
The peak of Mount Lokon, a stratovolcano with Tompaluan active crater on its flank, near Tomohon city, Gunung Lokon, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia
Mount Mahawu, a stratovolcano and active 180m wide crater, with Lokon on the left, and Empung volcanoes beyond, Gunung Mahawu, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia
Steaming fumarole with sulphur deposits in Tompaluan active crater by Mount Lokon volcano near Tomohon city, Gunung Lokon, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia
Sulphur for sale on the Crater rim on Mount Naka, an active volcano, Mount Aso, Kyushu, Japan, Asia
Japanese warning sign on the Crater rim of Mount Naka, an active volcano, Mount Aso, Kyushu, Japan, Asia
Japanese warning sign on the Crater rim of Mount Naka, an active volcano, Mount Aso, Kyushu, Japan, Asia
Crater rim on Mount Naka, an active volcano, Mount Aso, Kyushu, Japan, Asia
Shore of the Emerald Lake, natural vibrant colour gradient with view on the Red Crater Volcano of Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Aerial of the volcanic crater with Lake Mazafim, island of Annobon, Equatorial Guinea, Africa
Mount Lokon volcano with Tompaluan active crater on the saddle between next door Mount Empung, near Tomohon city, Gunung Lokon, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia
Steaming fumaroles, sulphur and volcanic strata in Tompaluan active crater by Mount Lokon volcano near Tomohon city, Gunung Lokon, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia
Japanese warning sign on the Crater rim of Mount Naka, an active volcano, Mount Aso, Kyushu, Japan, Asia
Crater rim path on Mount Naka, an active volcano, Mount Aso, Kyushu, Japan, Asia
Panorama of the red sunrise on Red Crater Volcano and view of Mount Tongariro, North Island, New Zealand, Pacific
Sunrise above the Emerald Lakes, view from red crater, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
The three emerald lakes and volcano landscape of the Tongariro Alpine Crossing, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
View along the slope and hiking trail up towards the Red Crater Volcano, on Tongariro Alpine Crossing, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Close up of turquoise, vibrant Emerald Lake with steaming volcano on Tongariro Crossing, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Burned out tree on the left with Sunset Crater Volcano in the background, near Flagstaff, Arizona, United States of America, North America
Sulphur at the Stefanos Volcano Crater, detailed view, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
Stefanos Volcano Crater, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
Crater rim path on Mount Naka, an active volcano, Mount Aso, Kyushu, Japan, Asia
Turquoise and yellow green Emerald Lake in front of the Tongariro Volcano, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Looking down into Ubehebe crater, a Maar volcano, caused by groundwater contacting hot magma or lava, Death Valley National Park, California, United States of America, North America
View from the Lower Lava Trail near Sunset Crater Volcano, north of Flagtaff, Arizona, United States of America, North America
Stefanos Volcano Crater, elevated view, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
Stefanos Volcano Crater, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
Sulphur at the Stefanos Volcano Crater, detailed view, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
Crater rim on Mount Naka active volcano, Mount Aso, Kyushu, Japan, Asia
Wide angle view of an Emerald Lake in front of Red Crater Volcano in the Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
The crater of a volcano on the island of Santo Antao, Cape Verde Islands, Atlantic Ocean
Panoramic of Naples city lights and Gulf at dusk from Vesuvius, Naples, Campania, Italy, Europe
Aerial view of Vesuvius crater and Sorrento peninsula at sunrise, Naples, Campania, Italy, Europe
Smoking Ambrym volcano, Vanuatu, Pacific
Crater of Rano Kau Volcano, Easter Island, Chile, South America
Mount Mahawu, a stratovolcano and active 180m wide crater, with Lokon on the left, and Empung volcanoes beyond, Gunung Mahawu, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia
Looking into the cinder cone of erupting Eyjafjallajokull volcano, Iceland, Polar Regions
Exploring a volcanic landscape on a footpath up Saxholl cinder cone and crater, Snaefellsjokull National Park, western Iceland, Polar Regions
View towards the Stefanos Volcano Crater, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
Sulphur at the Stefanos Volcano Crater, detailed view, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
Stefanos Volcano Crater, elevated view, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
View towards Stefanos Volcano Crater, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
View over the volcanic crater Taburiente, La Palma, Canary Islands, Spain, Europe
Lava erupting from Eyjafjallajokull volcano, Iceland, Polar Regions
Crater of the Poas volcano, San Jose, Costa Rica, Central America
People looking at view of Stromboli island from Gran crater rim, Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe
View of Sunset Crater Volcano from the east slope of the Lenox Crater Trail, the dark gray soil is volcanic pumice, Arizona, United States of America, North America
Stefanos Volcano Crater, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
View towards the Stefanos Volcano Crater, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
Early sunrise at the Mount Bromo crater, Bromo Tengger Semeru National Park, Java, Indonesia, Southeast Asia, Asia
Sulphur and fumarole smoke on volcano Gran crater, Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, north of Sicily, Italy, Mediterranean, Europe
Geologists taking minerals samples on Gran Cratere (The Great Crater), Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, north of Sicily, Italy, Mediterranean, Europe
Aerial view of the crater of Hondo volcano (Calderon Hondo), Corralejo, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Stefanos Volcano Crater, elevated view, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
Stefanos Volcano Crater, elevated view, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
Stefanos Volcano Crater at sunset, elevated view, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
Stefanos Volcano Crater, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
Stefanos Volcano Crater, elevated view, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
Stefanos Volcano Crater at dusk, elevated view, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
Sulphur at the Stefanos Volcano Crater, detailed view, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
Stefanos Volcano Crater, elevated view, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
Smoke rises from the active crater of Tungurahua Volcano that threatens the nearby resort town of Banos, Ambato Province, Central Highlands, Ecuador, South America
Lava flowing down mountain, Eyjafjallajokull volcano, Iceland, Polar Regions
Looking down into Ubehebe crater, a Maar volcano, caused by groundwater contacting hot magma or lava, Death Valley National Park, California, United States of America, North America
Stefanos Volcano Crater, elevated view, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe
El Sod Crater lake, Southern Ethiopia, Africa
Gran Cratere (The Large Crater), Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, north of Sicily, Italy, Mediterranean, Europe
Sulphur and fumaroles smoke on volcano Gran Cratere, Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, north of Sicily, Italy, Mediterranean, Europe
Khorgo volcano crater and White Lake in the background, Tariat district, North Hangay province, Mongolia, Central Asia, Asia
Nikia Village and Stefanos Volcano Crater at sunset, elevated view, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe