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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
Crateri Silvestri view, Etna, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Volcanic landscape, Valle del Bove, Etna, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Volcanic landscape, Valle del Bove, Etna, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Crateri Silvestri view, Etna, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Group of hikers walking up to Mount Etna summit, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Rock formations, Alcantara gorge, Castiglione di Sicilia, Sicily, Italy, Mediterranean, Europe
Grape vines growing in black volcanic soil in protected enclosed pits, La Geria, Lanzarote, Canary Islands, Spain, Atlantic, 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
Curved concave reflector panels desalinisation plant at the solar energy scientific research centre, Tabernas, Almeria, Andalusia, Spain, Europe
View of lava fields and snow-capped peaks in the distance, Etna, Sicily, Italy, Mediterranean, Europe
Malpais badlands volcanic landscape Montana Negra and Caldera Colorada, Parque Natural Los Volcanes, Masdache, Lanzarote, Canary islands, Spain, Atlantic, Europe
Volcanic landscape, Mount Etna, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Nisyros volcano, high angle view, Nisyros Island, Dodecanese Islands, Greek Islands, Greece, Europe
People walking around Stefanos crater moonlike landscape, Nisyros Island, Dodecanese Islands, Greek Islands, Greece, Europe
Tilted layers showing bedding planes in strata of sedimentary rock in coastal cliff at Odeceixe, Algarve, Portugal, Europe
Nisyros volcano, Nisyros Island, Dodecanese Islands, Greek Islands, Greece, Europe
People walking around Stefanos crater moonlike landscape, Nisyros Island, Dodecanese Islands, Greek Islands, Greece, Europe
Fossilised sand dune rock structure, Los Escullos, Cabo de Gata natural park, Almeria, Spain, Europe
Cone volcano near La Oliva, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Vegetation along Rota Vicentina Fishermen's Trail, long distance coast path, Rogil, Algarve, Portugal, Europe
Astronaut and earth display in museum, Lyndon B. Johnson Space Center, Houston, Texas, United States of America, North America
Tourists standing below Pia glacier, Tierra del Fuego, Chile, South America
Lava flows from Teneguia volcano, La Palma, Canary Islands, Spain, Atlantic Ocean, Europe
Lava and ash floes in the Galapagos Islands Archipelago, UNESCO World Heritage Site, Ecuador, South America
Aerials of the mountains around Kulusuk, Greenland, Denmark, Polar Regions
Polar bear (Ursus Maritimus) on Axel Heiberg island, Nunavut, Canadian Arctic, Canada, North America
Belcher glacier, Devon island, Nunavut, Canadian Arctic, Canada, North America
Very old rock formations, Dunes harbour, Devon island, Nunavut, Canadian Arctic, Canada, North America
Aerial of an ice arch in the Nuuk Icefjord, Western Greenland, Denmark, Polar Regions
Chunks of ice on a rocky beach, Baffin island, Nunavut, Canadian Arctic, Canada, North America
Arctic Desert, Baffin island, Nunavut, Canadian Arctic, Canada, North America
Mount Vesuvius volcano crater and red rock landscape, near Naples, Campania, Italy, Europe
El Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic, Europe
The Red Mountains rising behind the petrified sand dunes at Snow Canyon State Park, Southern Utah, United States of America, North America. Many famous films were made in the park which forms part of the Red Cliffs Desert Reserve.
The Red Mountains rising behind the petrified sand dunes at Snow Canyon State Park, Southern Utah, United States of America, North America. Many famous films were made in the park which forms part of the Red Cliffs Desert Reserve.
Scenic view of hoodoos and rock formations, Sunrise Point, Bryce Canyon National Park, Utah, United States of America, North America
Double Arch in the Windows Section, Arches National Park, Moab, Utah, United States of America, North America
Grand Canyon, Desert View Viewpoint, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Grand Canyon, Navajo Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Grand Canyon, Moran Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Grand Canyon, from Hermit Road near Hopi Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Grand Canyon, Hopi Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Grand Canyon, from Hermit Road, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Guests from the Lindblad Expedition ship National Geographic Endeavour in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Views of the eastern side of the Antarctic Peninsula in the Weddell Sea, Antarctica, Polar Regions
Petrified sand dunes, White Canyon State Park, Red Cliffs Desert Reserve near St. George, Utah, United States of America
Petrified sand dunes, White Canyon State Park, Red Cliffs Desert Reserve near St. George, Utah, United States of America
Geology lines in Sandvannet Lake, Nordland County, Norway. The Glomfjord Mountains are visible on the horizon.
Rock formations on Glomfjordfjellet Mountain in Nordland County, Norway.
Perito Moreno glacier, Lago Argentino, Argentina.
Old ice breaking under newer ice when the lake froze, Lake Baikal, Russia.
Person hiking on Matanuska Glacier, Alaska.
Panorama of Perito Moreno glacier, Lago Argentino, Argentina.
Neko Harbor, Antarctic Peninsula.
Wilhelmina Bay iceberg, Antarctic Peninsula.
Wilhelmina Bay iceberg, Antarctic Peninsula.
Wilhelmina Bay iceberg, Antarctic Peninsula.
Rock formation protruding from the frozen lake, Lake Baikal, Russia.
Chinstrap penguins on an iceberg near Aitcho Islands, Antarctic Peninsula.
Chinstrap penguins on an iceberg near Aitcho Islands, Antarctic Peninsula.
Perito Moreno glacier, Lago Argentino, Argentina.
Perito Moreno glacier, Lago Argentino, Argentina.
Aerial view of Mount McKinley, Alaska.
Old ice breaking under newer ice when the lake froze, Lake Baikal, Russia.
Aerial view of Mount McKinley, Alaska.
Perito Moreno glacier ice breaks into the lake, Lago Argentino.
Iceberg in Lago Argentino, Argentina.
Lake inside a crater, Iceland.
Iceberg around the island, Spitsbergen, Norway.
Arctic view, Spitsbergen, Norway.
Inside a frozen cave, Lake Baikal, Russia.
October 19, 2013 - Eruption of Kliuchevskoi (Klyuchevskoy) Volcano, Kamchatka, Russia. Ash and steam cloud are blown away by wind. View over industrial area of Kliuchi town with Kamchatka River in foreground.
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 15, 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 24, 2013 - Eruption of Kliuchevskoi (Klyuchevskoy) Volcano, Kamchatka, Russia, seen in evening light. Ash cloud is produced by the activity. Kamen volcano is seen on right.
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.
February 24, 2013 - Mushroom shaped ash cloud produced by powerful explosive eruption of Sakurajima volcano, Kagoshima, Japan.
February 24, 2013 - Ash cloud rising following eruption of Sakurajima volcano, Japan
February 24, 2013 - Powerful explosive eruption of Sakurajima volcano, Japan. Ash cloud rises against blue sky.
February 23, 2013 - Powerful night time explosive eruption of Sakurajima volcano, Japan. Trajectories of glowing incandescent volcanic bombs are visible.
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 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.
November 30, 2012 - Glowing Rerombola lava dome of Paluweh (or Rokatenda) volcano during eruption in 2012, Flores, Indonesia.
November 30, 2012 - Glowing Rerombola lava dome with incandescent rockfall deposit, Paluweh volcano, Flores, Indonesia.
November 28, 2012 - Explosive strombolian type eruption of Batu Tara volcano, Komba Island, Indonesia. Trajectories of red glowing lava bombs are visible against blue night sky.
November 27, 2012 - Explosive strombolian type eruption of Batu Tara volcano, Komba Island, Indonesia. Trajectories of red glowing lava bombs are visible.
November 25, 2012 - Extrusion of lava through lava plug on top of conduit leads to small glowing rockfalls. Batu Tara volcano, Komba Island, Indonesia.
November 26, 2012 - Powerful explosive strombolian type eruption of Batu Tara volcano, Komba Island, Indonesia. Trajectories of red glowing lava bombs are visible.
November 26, 2012 - Explosive strombolian type eruption of Batu Tara volcano, Komba Island, Indonesia. Trajectories of red glowing lava bombs are visible.
November 25, 2012 - Explosive strombolian type eruption of Batu Tara volcano, Komba Island, Indonesia. Trajectories of red glowing lava bombs are visible.
November 26, 2012 - Explosive strombolian type eruption of Batu Tara volcano, Komba Island, Indonesia. Trajectories of red glowing lava bombs are visible.
April 1, 2012 - Lava flowing into Valle del Bove at Mount Etna Volcano, Italy, following paroxysmal eruption.