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Icebergs at sunrise on Jokulsarlon Beach, a black volcanic sand beach in South East Iceland, Iceland, Polar Regions
Icebergs at sunset on Jokulsarlon Beach, a black volcanic sand beach in South East Iceland, Iceland, Polar Regions
Toliman volcano, Lago de Atitlan, Guatemala, Central America
Wai-O-Tapu, Rotorua, North Island, New Zealand, Pacific
Icebergs on a black sand volcanic beach next to the Jokulsarlon glacial lake in Vatnajokull National Park in southeast Iceland, Polar Regions
The very active lava lake of Mount Nyiragongo, Virunga National Park, UNESCO World Heritage Site, Democratic Republic of the Congo, Africa
Old lighthouse in the volcanic landscape of Iceland near Akranes, the ninth most populous city in the country, Iceland, Polar Regions
Rocky volcanic badlands (malpais) landscape, Malpais Grande National Park, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Volcanic beach below Volcano Tavurvur, Rabaul, East New Britain, Papua New Guinea, Pacific
The Lava Store at the base of Pacaya Volcano in Guatemala City, Guatemala, Central America
Haleakala Crater, in Haleakala National Park, Maui's dormant volcano, Hawaii, United States of America, Pacific, North America
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
Aerial of Lalolalo lake volcanic crater lake, center of Wallis, Wallis and Futuna, South Pacific, Pacific
Icebergs on a black sand volcanic beach next to the Jokulsarlon glacial lake in Vatnajokull National Park, southeast Iceland, Polar Regions
Smoke plume rising over glacier, Eyjafjallajokull volcano, Iceland, Polar Regions
Desert road stretching into the distance with rocky mountains under a clear blue sky in Tenerife, Canary Islands, Spain, Atlantic, Europe
Icebergs on a black sand volcanic beach next to the Jokulsarlon glacial lake in Vatnajokull National Park in southeast Iceland, Polar Regions
Example of pahoehoe lava on Fernandina Island, Galapagos Islands, Ecuador, South America
Solfatara, volcanic crater with active fumaroles, Pozzuoli, Naples, Campania, Italy, Europe
Toliman volcano, Lago de Atitlan, Guatemala, Central America
Icebergs on a black sand volcanic beach next to the Jokulsarlon glacial lake in Vatnajokull National Park in southeast Iceland, Polar Regions
Glassy pieces of ice on volcanic black sand beach with blurred waves, near Jokulsarlon Lagoon, South Iceland, Polar Regions
Plume of water and steam from the Strokkur Geysir exploding into the air at Geysir near Reykjavik, Iceland, Polar Regions
Tourists hiking in rain to the Skutustadagigar pseudo craters, wild flowers, Lake Myvatn, Akureyri, Iceland, Europe
Reykjanes Peninsula, Iceland, Polar Regions
Scenic view of a tranquil volcanic landscape with clear blue sky in Tenerife, Canary Islands, Spain, Atlantic, Europe
Vik black volcanic sand beach, Vik, Iceland, Polar Regions
Volcanic peaks against deep blue sky, Jandia peninsula, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Brown Bluff huge volcanic basalt, Tabarin Peninsula, Antarctica, Polar Regions
People enjoying hiking to the volcanic Roque Nublo in the Nublo Rural Park in the centre of Gran Canaria, Canary Islands, Spain, Atlantic, Europe
The Volcanic Tongariro Crossing, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Fuego Volcano, Antigua, Guatemala, Central America
Icebergs at sunrise on Jokulsarlon Beach, a black volcanic sand beach in South East Iceland, Iceland, Polar Regions
The Emerald Lakes, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Climbing Pacaya volcano, with Fuego Volcano in distance, Antigua, Guatemala, Central America
Glassy pieces of ice on volcanic black sand beach at sunrise, near Jokulsarlon Lagoon, South Iceland, Polar Regions
Fuego Volcano, Antigua, Guatemala, Central America
Central highlands, town of Banos, built on a lava terrace, Ecuador, South America
Climbing Pacaya volcano, with Fuego Volcano in distance Antigua, Guatemala, Central America
Hiking towards the refuge, Cotopaxi Volcano, 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
Iceberg at sunrise on Jokulsarlon Beach, a black volcanic sand beach in South East Iceland, Iceland, Polar Regions
Brown Bluff huge volcanic basalt, Tabarin Peninsula, Antarctica, Polar Regions
Hikers at Cotopaxi volcano, Ecuador, South America
Quilotoa Loop, volcanic crater lake, Ecuador, South America
Inca natural bridge, volcanic sediment, Mendoza district, Argentina, South America
Icebergs on a black sand volcanic beach next to the Jokulsarlon glacial lake in Vatnajokull National Park in southeast Iceland, Polar Regions
Glacier on Brown Bluff huge volcanic basalt, Tabarin Peninsula, Antarctica, Polar Regions
Lava flow, Fernandina Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Toliman volcano, Lago de Atitlan, Guatemala, Central America
Glassy pieces of ice on volcanic black sand beach at sunrise, near Jokulsarlon Lagoon, South Iceland, Polar Regions
Icebergs at sunrise on Jokulsarlon Beach, a black volcanic sand beach in South East Iceland, Iceland, Polar Regions
Skalafellsjokull, Vatnajokull National Park, Iceland, Polar Regions
Fuego Volcano, Antigua, Guatemala, Central America
Glassy pieces of ice on volcanic black sand beach at sunrise, near Jokulsarlon Lagoon, South Iceland, Polar Regions
Glassy pieces of ice on volcanic black sand beach at sunrise, near Jokulsarlon Lagoon, South Iceland, Polar Regions
Glassy pieces of ice on volcanic black sand beach at sunrise, near Jokulsarlon Lagoon, South Iceland, Polar Regions
The Tongariro Crossing, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Clouds obscure the coastal villages below the dark volcanic mountains of Tenerife's north east coast at sunset, Canary Islands, Spain, Atlantic Ocean, Europe
Glassy pieces of ice on volcanic black sand beach with blurred waves, near Jokulsarlon Lagoon, South Iceland, Polar Regions
Icebergs at sunset on Jokulsa Beach, on the edge of the Vatnajokull National Park, South Iceland, Iceland, Polar Regions
Looking towards the sea stacks of Reynisdrangar at sunrise from the black volcanic sand beach at Vik i Myrdal, South Iceland, Polar Regions
Volcanic cones on top of Mauna Kea, Big Island, Hawaii, United States of America, Pacific
Lava flowing down mountain, Eyjafjallajokull volcano, Iceland, Polar Regions
The Volcano Route, La Palma, Canary Islands, Spain, Atlantic Ocean, Europe
Eldborg volcanic crater, declared a Protected Natural Monument in 1974, Iceland, Polar Regions
A view of SnA�fellsjokull in the Snaefellsnes Peninsula at sunset, Iceland, Polar Regions
El Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic, Europe
El Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic, Europe
El Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic, Europe
Hiking path in the ashes of Mount Fuji in a fog cloud, Honshu, Japan, Asia
Ubinas volcano reflected in a pool at salt flats, Salinas y Aguada Blanca National Reserve, Arequipa Province, Arequipa Region, Peru, South America
October 16, 2013 - Nighttime eruption of Kliuchevskoi (Klyuchevskoy) Volcano, Kamchatka, Russia. Ash cloud and lava flow are produced by the activity of the snowcovered conical stratovolcano. Column of steam rises where lava flow is melting glacier.
October 16, 2013 - Nighttime eruption of Kliuchevskoi (Klyuchevskoy) Volcano, Kamchatka, Russia.
Ash cloud and lava flow are produced by the activity of the snowcovered conical stratovolcano.
October 21, 2013 - Nighttime view of incandescent rockfall of glowing lava down flank of lava dome of Shiveluch Volcano, Kamchatka, Russia.
October 16, 2013 - Eruption of Kliuchevskoi (Klyuchevskoy) Volcano, Kamchatka, Russia. Ash cloud and lava flow are produced by the volcano which is partially shrouded in cloud. Kamen volcano is seen on right.
October 16, 2013 - Nighttime eruption of Kliuchevskoi (Klyuchevskoy) Volcano, Kamchatka, Russia. Ash cloud and lava flow are produced by the activity of the volcano which is partially shrouded in cloud. Kamen volcano is seen on right.
October 21, 2013 - Nighttime moonlit view of incandescent rockfall of glowing lava down flank of lava dome of Shiveluch Volcano, Kamchatka, Russia.
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.
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 24, 2012 - Scoria cone on Nyamuragira Volcano, Democratic Republic of Congo.
January 24, 2012 - Yellow sulphurous deposits resulting from degassing coating scoria cone formed during eruption on Nyamuragira Volcano, Democratic Republic of Congo.
February 10, 2008 - Dallol geothermal area, 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, 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, terraces of 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.
Popocatepetl Volcano seen from Cholula, Puebla State, Mexico
A tourist observes Teide volcano from La Ruleta viewpoint during sunrise, Teide National Park, La Orotava, Santa Cruz de Tenerife, Tenerife, Canary Islands, Macaronesia, Spain, Western Europe
Teide volcano from La Ruleta viewpoint during sunset, Teide National Park, La Orotava, Santa Cruz de Tenerife, Tenerife, Canary Islands, Macaronesia, Spain, Western Europe
Landscape around Wakan village, Western Al Hajar Mountains, border South Batinah and Al Dakhiliyah Governorates, Oman, Arabian Peninsula
The spectacular scenery on the island of Madeira, Atlantic Ocean, Portugal
Mountain landscape on Kilimanjaro, 5895 metres, UNESCO, highest mountain in Africa and one of the Seven Summits, Tanzania
Landscape in the Chalten Massif, Patagonia, Argentina