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November 2006 - Lava flowing from base of hornito during eruption of Mount Etna volcano, Sicily, Italy.
November 2006 - Lava flowing from base of hornito during eruption of Mount Etna volcano, Sicily, Italy.
February 11, 2008 - Dallol geothermal area, egg-shaped fumarole deposits formed in salt deposits of brine hot springs, Danakil Depression, Ethiopia.
January 27, 2011 - Dallol geothermal area, terraces, potassium salt deposits formed by brine hot springs, Danakil Depression, Ethiopia.
Licancabur stratovolcano reflected in Laguna Tebinquinche, Chile.
Lake Arhuaycocha, Peru.
Crystal Mesa above Crystal Creek west of Hamilili Point in Petrified Forest National Park, Arizona, United States of America, North America
Folded sedimentary rocks in cliffs at Welcombe Mouth, on the Atlantic coast; Hartland, north Devon, England, United Kingdom, Europe
Landscape in Angochagua Parochia, Imbabura Province, Ecuador
View of Roaring Springs Canyon along the North Kaibab Trail at Grand Canyon North Rim, UNESCO, Arizona, United States of America
Stac Pollaidh, Assynt, Sutherland, Highlands, Scotland, United Kingdom
Ardvreck Castle, Loch Assynt, Ross and Cromarty, Highlands, Scotland, United Kingdom
Ardvreck Castle, Loch Assynt, Ross and Cromarty, Highlands, Scotland, United Kingdom
Inishbofin island, Connemara, County Galway, Connacht, Republic of Ireland
Natural arch in Puerto Refugio on the northern end of Angel de la Guarda Island, Baja California, Sea of Cortez, Mexico, North America
Praia da Rocha beach, Atlantic Ocean, Portimao, Algarve, Portugal, Europe
Natural cave formation on a rocky hill with green plantation stretching to the sea, Zakynthos, Ionian Islands, Greek Islands, Greece, Europe
Central mountains from near summit of Pico do Areeiro, Madeira
Monte Alban Archaeological Site, Oaxaca State, Mexico
Petrified Waterfall at dusk, Hierve el Agua, San Lorenzo Albarradas, Oaxaca State, Mexico
Sumidero Canyon, elevated view, Chiapas State, Mexico
Sumidero Canyon, Chiapas State, Mexico
Sumidero Canyon, Chiapas State, Mexico
Dr. Belisario Dominguez Bridge over the Grijalva River, Chiapa de Corzo, Chiapas State, Mexico
Tulum Archeological Site, Quintana Roo State, Mexico
View of the Sphinx at the Pyramids of Giza on a sunny day, Giza, Cairo, Egypt, Africa
Hikers amongst hoodoo formations on the Fairyland Trail in Bryce Canyon National Park, Utah, United States of America, North America
Hikers amongst hoodoo formations on the Sunrise Point Trail in Bryce Canyon National Park, Utah, United States of America, North America
View of hoodoo formations from the Fairyland Trail in Bryce Canyon National Park, Utah, United States of America, North America
Sewell Mining Town, UNESCO World Heritage Site, Chile, South America
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Valle Rojo (Red Valley) at sunrise, near Rainbow Mountain, Pitumarca District, Cusco (Cuzco) Region, Peru, South America
Aerial drone view of particular ice textures formed in the Svinafellsjokull glacier following global warming, Iceland, Polar Regions
Lago dei Piani inferiore, Three Peaks Nature Park, Dolomites, South Tyrol (Alto Adige), Italy
An island of rock in an unnamed canyon that leads to Dead Wash in Petrified Forest National Park, Arizona, United States of America
Dead Wash Valley in Petrified Forest National Park, Arizona, United States of America
White chalk cliffs in Sarakiniko, Milos island, Cyclades, Greek Islands, Greece
Extreme tidal range shown here at low tide as found on Bigge Island, Kimberley, Western Australia, Australia, Pacific
Xwejni Bay, a centre for swimmers and divers, near Zebbug, Gozo, Malta, Mediterranean, Europe
Limestone cliffs and beach, Dunraven Bay, Southerndown, Vale of Glamorgan, South Wales, United Kingdom
River Ogmore estuary, Ogmore-by-Sea, Bridgend, South Wales, United Kingdom
Limestone cliffs, Dunraven Bay, Southerndown, Vale of Glamorgan, South Wales, United Kingdom
Wadi Shab, canyon near Tiwi, Sultanate of Oman, Arabian Peninsula
Track (Al Barida Road) on western slope of Djebel Ahkdar from Sharaf al Alamayn Pass, 2036m, to Bilad Sayt and Rustaq road, Oman, Arabian Peninsula
Scala dei Turchi, Agrigento, Sicily, Italy
Scala dei Turchi, Agrigento, Sicily, Italy
Casner Canyon in Wet Beaver Creek Wilderness viewed from White Mesa summit, in Coconino National Forest, Arizona, United States of America
Stag rock, Bamburgh, Northumberland, England, United Kingdom
Sunset over the hills behind Granada and wide landscapes with the snowy Sierra Nevada behind, Granada, Andalusia, Spain
People using binoculars to see rock cut tombs in cliffs at Dadan, ancient capital of Dadan And Lihyan kingdoms, AlUla, Medina Province, Saudi Arabia
Maraya Theatre, architect Studio Gio Forma, mirrored structure seeming to disappear in AlUla's Ashar Valley, AlUla, Medina Province, Saudi Arabia
Road through the sandstone rock formations in the desert canyons of the Ashar Valley, Medina Province, Saudi Arabia
Road through the sandstone rock formations in the desert canyons of the Ashar Valley, Medina Province, Saudi Arabia
Cave of Elafonisos island with orange rock color painted in white, Greece
Cave of Elafonisos island with orange rock color painted in white, Greece
Cave of Elafonisos island with orange rock color painted in white, Greece
Pinnacle Rock on Bartolome Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Extraordinary sandstone rock structure called Dancing Rocks in the Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia
Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia
Woman responsible for ensuring safety and good behavior of visitors at the Viewpoint, Harrat volcanic plateau, AlUla, Medina Province, Saudi Arabia
Woman responsible for ensuring visitor safety and good behavior at the Viewpoint, Harrat volcanic plateau, AlUla, Medina Province, Saudi Arabia
Remarkable sandstone rock carved by erosion in the Ashar Valley, AlUla, Medina Province, Saudi Arabia
Guide in the sacred part of Jabal Ithlib area within the Site of Hegra (Madain Salih), UNESCO, AlUla, Medina Province, Saudi Arabia
Tomb carved into sandstone rock of Jabal Banat (Qasr Al-Bint) area in site of Hegra (Madain Salih), UNESCO, AlUla, Medina Province, Saudi Arabia
Tombs carved into sandstone rock of Jabal Banat (Qasr Al-Bint) area in site of Hegra (Madain Salih), UNESCO, AlUla, Medina Province, Saudi Arabia
Tombs carved into the sandstone rock of Jabal Banat (Qasr al-Bint) area within site of Hegra, UNESCO, AlUla, Medina Province, Saudi Arabia
Sunset, Liathach, Torridon, northern Scotland
Rannoch Moor, northern Scotland
Golden evening light on the cliffs in winter at Dunraven Bay, Southerndown, Bridgend, South Wales, United Kingdom
Golden evening light on the cliffs in winter at Dunraven Bay, Southerndown, Bridgend, South Wales, United Kingdom
Ruins of Machu Colca, Sacred Valley, Urubamba Province, Cusco (Cuzco) Region, Peru, South America
The archaeological ruins of Pompeii, UNESCO, Campania, Italy
View of New Island in the Falkland Islands
Dunraven Bay, Southerndown, South Wales, United Kingdom
Dunraven Bay, Southerndown, South Wales, United Kingdom
Underwater view of the reef along the circumference of the Great Blue Hole on Lighthouse Reef, UNESCO, Belize
Beautiful rock formations around Zouar, Tibesti Mountains, Chad
Aerial of the sunset over rocky mountains around Zouar, Tibesti Mountains, Chad
Aerial of beautiful rock formations at sunset around Zouar, Tibesti Mountains, Chad
Aerial of beautiful rock formations around Zouar, Tibesti Mountains, Chad
Aerial of beautiful rock formations around Zouar, Tibesti Mountains, Chad
Aerial of beautiful rock formations around Zouar, Tibesti Mountains, Chad
Aerial of beautiful rock formations around Zouar, Tibesti Mountains, Chad
View of landscape and coast on a sunny day in winter from Kopavogskirkja, Reykjavik, Iceland
Icefall along the Lagazuoi mountain slope, Dolomites, Italy
Moai heads of Easter Island, Rapa Nui National Park, UNESCO World Heritage Site, Easter Island, Chile, South America
Caldera de Taburiente National Park, UNESCO Biosphere Site, La Palma, Canary Islands, Spain, Atlantic, Europe
Capela do Senhor da Pedra (Chapel of the Lord of Stone), at a coastal site originally used for pagan worship, Miramar, Greater Porto, Portugal, Europe
View over the Queen's Garden from the Rim Trail at Sunset Point, Bryce Canyon National Park, Utah, United States of America, North America
Dunes of Avdz?r, Niger, Western Africa
Ring of Brodgar, UNESCO, Orkney Islands, Scotland, United Kingdom
Tengah Beach, Langkawi, Kedah, Malaysia
Gnalloden reflected in meltwater pond at Hornsund, Spitsbergen, Svalbard, Arctic, Norway, Scandinavia, Europe
The 1610m active Volcan Concepcion, greater of two volcanoes that form popular Omotepe Island (Isla Omotepe), Lake Nicaragua, Nicaragua, Central America
Megalithic stones in the Menec Alignment at Carnac, Brittany, France, 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
Geysers El Tatio, Antofagasta Region, Chile, South America
Volcanic rock formations on the shores of White Lake, Tariat district, North Hangay province, Mongolia, Central Asia, Asia
Volcano Arenal, seen from La Fortuna de San Carlos, Costa Rica, Central America
Salt formations on the shore of the Dead Sea at dusk, Karak Governorate, Jordan, Middle East