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Ilakaka sapphire mine, one of Earth's largest known alluvial sapphire deposits, Ilakaka, Ihorombe Region, Madagascar, Africa
Jagged ledges on the dramatic north Devon coast, Devon, England, United Kingdom, Europe
St. Michael's Chapel on Roche Rock, Cornwall, England, United Kingdom, Europe
Angel Falls, Canaima National Park, Venezuela, South America
Geothermal steam, frosted trees and snow-free hot ground in Norris Basin in winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Smoking geothermal acitve field in the Waimangu Volcanic Valley, North Island, New Zealand, Pacific
Cliffs and hoodoos lit by late afternoon sun in winter, Paria View, Bryce Canyon National Park, Utah, United States of America, North America
Wall of Windows lit by early morning sun, silhouetted rock, Peekaboo Loop Trail, Bryce Canyon National Park, Utah, United States of America, North America
Hillside terraces countryside landscape, near Huebro, Ruta del Agua, Sierra Alhamilla mountains, Nijar, Almeria, Andalusia, Spain, Europe
Anse Source d'Argent beach, La Digue, Seychelles, Indian Ocean, Africa
Snow-capped peaks and glaciers in Icy Arm, Baffin Island, Nunavut, Canada, North America
Limestone pinnacles in Shilin, Stone Forest, at Lunan, Yunnan, China, Asia
The beehive-like mounds in the Purnululu National Park, UNESCO World Heritage Site, Bungle Bungle Mountain Range, Western Australia, Australia, Pacific
Rock petroglyphs in the sandstone rock at Twyfelfontein, UNESCO World Heritage Site, Namibia, Africa
Bare moon-like arid landscape in mountains between Pajara and La Pared, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Interesting geological rock formations at Ajuy, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Rocca di Cerere and surrounding Valley, elevated view, Enna, Sicily, Italy, Mediterranean, Europe
View of the Hermitage of Santa Maria di Montevergine, Caltabellotta, Agrigento district, Sicily, Italy, Mediterranean, Europe
Crateri Silvestri, high angle view, Etna, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Volcanic landscape, Mount 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
View of lava fields and snow-capped peaks in the distance, Etna, Sicily, Italy, Mediterranean, Europe
View of lava fields and snow-capped peaks in the distance, Etna, Sicily, Italy, Mediterranean, Europe
Dunes reflecting in the flooded pan of Sossusvlei caused by rare heavy rainfall, with dried mud in the foreground as the water evaporates, Namib Desert near Sesriem, Namib Naukluft Park, Namibia, Africa
Karst Cave at Xinwen Stone Sea Global Geo Park, Sichuan Province, China, Asia
Montana de Medio, mountain, Los Ajaches mountain range, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Atlantic coast in south west corner, Los Charcones, Caleta Negra bay, near Playa Blanca, Lanzarote, Canary islands, Spain, Atlantic, Europe
Volcanic landscape of solidified lava flows and distant cone volcanoes, near Yaiza, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Walkway over lava field, Timanfaya Volcano Interpretation and Visitors' Centre, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Lands End rock formation, Los Cabos, Baja California, Mexico, North America
View of Thun from Niesen mountain, Canton of Bern, Switzerland
The Sol de Manana geysers, a geothermal field at a height of 5000 metres, Bolivia, South America
Mesa Verde National Park, Cliff Palace, UNESCO World Heritage Site, Colorado, United States of America, North America
Bare tree among boulders at sunrise, Joshua Tree National Park, California, United States of America, North America
Natural Bridges National Monument, view from Horsecollar Ruin Overlook Trail, Utah, United States of America, North America
Canyon de Chelly National Monument, View from the Whitehouse Overlook, Arizona, United States of America
Canyon de Chelly National Monument, View from the Whitehouse Overlook, Arizona, United States of America, North America
Tourists gather to watch Strokker geyser (geysir), an erupting spring at Haukadalur, Iceland, Polar Regions
Sunset on Seven Mile Beach, West Coast, South Island, New Zealand, Pacific
Stonehole Bay beach, Bermuda, Central America
Gritstone formations at Brimham Rocks reflected in frozen flood water, Summerbridge, North Yorkshire, Yorkshire, England, United Kingdom, Europe
Tufa spires and tower formations of calcium carbonate at sunset, Mono Lake, South Tufa Reserve, Mono Basin Scenic Area, Lee Vining, Inyo National Forest Scenic Area, California, United States of America, North America
Pohutu Geyser, Rotorua, North Island, New Zealand, Pacific
Coastal landscape with rugged cliffs, green vegetation, and a view of the ocean under a cloudy sky at Durdle Door, Jurassic Coast, UNESCO World Heritage Site, Dorset, England, United Kingdom, Europe
The natural show of Frasassi Caves with sharp stalactites and stalagmites, Genga, Province of Ancona, Marche, Italy, Europe
Rocky shore of Nash Point at twilight, Glamorgan Heritage Coast, Wales, United Kingdom, Europe
Twilight on the rocky shores of Kilve, Somerset, England, United Kingdom, Europe
Upper Antelope Canyon (Tse' bighanilini), LeChee Chapter, Navajo Nation, Arizona, United States of America, North America
Beautiful clear water at Kuta Beach, Kuta Lombok, South Lombok, Indonesia, Southeast Asia, Asia
Hartland Point from Hartland Quay, Devon, England, United Kingdom, Europe
Kawah Ijen volcano ridge (Ijen crater), Banyuwangi, East Java, Indonesia, Southeast Asia, Asia
Kawah Ijen volcano (Ijen crater and lake), Banyuwangi, East Java, Indonesia, Southeast Asia, Asia
Basalt columns and a tourist ferry, Staffa Island, Inner Hebrides, Scotland, United Kingdom, Euorpe
Basalt columns, Staffa Island, Inner Hebrides, Scotland, United Kingdom, Europe
Goreme, UNESCO World Heritage Site, Cappadocia, Anatolia, Turkey, Asia Minor, Eurasia
El Obelisco, Quebrada de Cafayate (Quebrada de las Conchas) (Cafayate Gorge), Salta Province, North Argentina, South America
Secret Falls in the fall, Washington County, Utah, United States of America, North America
Smoking Volcano Tavurvur, Rabaul, East New Britain, Papua New Guinea, Pacific
The rock towers that give the Torres del Paine range its name, Torres del Paine National Park, Patagonia, Chile, South America
Colourful spings of acid in Dallol, hottest place on earth, Danakil depression, Ethiopia, Africa
Granite outcrop near Saddle Tor in Dartmoor National Park, Devon, England, United Kingdom, Europe
Egg Factory at dawn, Bisti Wilderness, New Mexico, United States of America, North America
The Cliffs of Moher and Branaunmore sea stack, Burren region in County Clare, Munster, Republic of Ireland, Europe
Ingleborough seen from Twistleton Scar, Yorkshire Dales National Park, North Yorkshire, England, United Kingdom, Europe
The exposed eroded cliffs of the Glamorgan Heritage Coast, Monknash, South Wales, United Kingdom, Europe
The karst limestone formation at Parc National des Tsingy de Bemaraha, UNESCO World Heritage Site, Tsiribihina region, Madagascar, Africa
Deserted beach at Lee Bay, North Devon, England, United Kingdom, Europe
Erupting geyser and Old Faithful Inn, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Glacier walk tour, Fox Glacier, West Coast, South Island, New Zealand, South Pacific
Multi coloured geothermal river in the Waimangu Volcanic Valley, North Island, New Zealand, Pacific
Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Mud Volcano Area, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Steam vent at Namaskard geothermal area (Namafjall-Hverarond), Mount Burfell, 935m, behind, near Lake Myvatn and Reykjahlid, North Iceland, Iceland, Polar Regions
Active lava stream, Tolbachik volcano, Kamchatka, Russia, Eurasia
Pinatubo volcano, Luzon, Philippines, Southeast Asia, Asia
Dry river before the the beehive-like mounds in the Purnululu National Park, UNESCO World Heritage Site, Bungle Bungle mountain range, Western Australia, Australia, Pacific
Castiglione di Sicilia, a small village on Mount Etna Volcano, Sicily, Italy, Europe
Tourists visiting an old lava flow from an eruption on Mount Etna, UNESCO World Heritage Site, Sicily, Italy, Europe
Mount Etna Volcano, old lava flow from an eruption, UNESCO World Heritage Site, Sicily, Italy, Europe
Mud being ejected from the caldera floor of an active andesite stratovolcano on White Island, North Island, New Zealand, Pacific
Visitors to an active andesite stratovolcano on White Island, off the East side of North Island, New Zealand, Pacific
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
Ruins of pre-Spanish Mahos village, Poblado de la Atalayita, Pozo Negro, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
An old and twisted tree in a limestone pavement near to Malham in the Yorkshire Dales, Yorkshire, England, United Kingdom, Europe
Haleakala Crater, in Haleakala National Park, Maui's dormant volcano, Hawaii, United States of America, Pacific, North America
Heads carved into rocks at Enchanted Castle, Sciacca, Agrigento district, Sicily, Italy, Mediterranean, Europe
Volcanic landscape, Valle del Bove, 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
Volcanic landscape, Etna, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Traditional sea salt production, Salinas de Janubio, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Malpais badlands volcanic landscape Montana Negra and Caldera Colorada, Parque Natural Los Volcanes, Masdache, 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
People walking around Stefanos crater moonlike landscape, Nisyros Island, Dodecanese Islands, Greek Islands, Greece, Europe
Symphony of Stones basalt columns, UNESCO World Heritage Site, Garni, Kotayk Province, Armenia, Caucasus, Central Asia, Asia
Steaming geothermal area at Orakei Korako Thermal Park, The Hidden Valley, North Island, New Zealand, Pacific
Information panel about geology, La Isleta, Cabo de Gata national park, Almeria, Andalusia, Spain, Europe
A low sun lights Brahma and Zoroaster temples and the cliff below Hopi Point with the metamorphic Vishnu basement rocks below, Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America
Mesa Verde National Park, Spruce Tree House, UNESCO World Heritage Site, Colorado, United States of America, North America
Little Bear Creek at sunrise, Shoshone National Forest, Montana, United States of America, North America