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Close-up of the limestone terraces formed by volcanic water depositing six inches of calcium carbonate a year, Mammoth Hot Springs and Terraces, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Close-up of polychromic sandstone rock patterns, Petra, Jordan, Middle East
Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Echinus Geyser, erupts every hour in Norris Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Rock formations of the Three Sisters from Echo Point, Blue Mountains, UNESCO World Heritage Site, New South Wales (NSW), Australia, Pacific
Tourists on viewing platform, Punakaiki, Pancake Rocks and blowholes, Paparoa National Park, Westland, South Island, New Zealand, Pacific
Beauchamp Falls, Blue Mountains National Park, UNESCO World Heritage Site, near Blackheath, New South Wales (N.S.W.), Australia, Pacific
Moraine Lake with mountains that overlook Valley of the Ten Peaks, Banff National Park, Canada, North America
Rocks on coast, Ile Therese (Therese island), northwest coast, island of Mahe, Seychelles, Indian Ocean, Africa
Rocks, Cornwall, England, United Kingdom, Europe
Hot water in pools on calcite terraces deposited by Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Waterfall, Dynjandi, western area, Iceland, Polar Regions
Turret Arch through North Window at sunrise, Arches National Park, Moab, Utah, United States of America, North America
Lindisfarne Castle, Holy Island, Northumberland, England, United Kingdom, Europe
Upper Dells, Wisconsin Dells, Wisconsin, United States of America, North America
The world's largest natural pitch lake, 90 meters deep, Trinidad, West Indies, Caribbean, Central America
The world's largest natural pitch lake, 90 meters deep, Trinidad, West Indies, Caribbean, Central America
Cliffs of the Calanques, near Cassis, Bouches-du-Rhone, Cote d'Azur, Provence, France, Mediterranean, Europe
Artist's Palette, Artist's Drive, Death Valley National Park, California, United States of America, North America
Overlooking the Afar Valley near the Bay of Ghoubbet, Djibouti, Africa
Cracked dried up soil, Ethiopia, Africa
The Devil's Pebbles, piles of granite boulders near the Stuart Highway, north of Tennant Creek, Northern Territory, Australia, Pacific
Grottes de Lacave, Dordogne, France, Europe
Swyre Head, near Lulworth, Dorset, England, United Kingdom, Europe
Hoba meteorite, Namibia, Africa
Weathered sandstone rocks and natural archway at Ponta da Piedade at low tide, Lagos, Algarve, Portugal, Europe
Jokulsarlon glacial lagoon beneath Breidarmerkurjokull (Vatnajokull) glacier which feeds it, south-east Iceland (Austurland), Iceland, Polar Regions
Gokyo Lakes, Gokyo, Sagarmatha National Park, UNESCO World Heritage Site), Solukhumbu District, Sagarmatha, Eastern Region, Nepal, Asia
Tvinnefoss waterfall, near Voss, western Norway, Norway, Scandinavia, Europe
Erg Ubari desert, Ubari, Libya, North Africa, Africa
Rock formations in the interior of the Cango Caves, near Oudtshoorn, South Africa, Africa
Kilauea thermal area, Hawaii Volcanoes National Park, UNESCO World Heritage Site, Island of Hawaii (Big Island), Hawaii, United States of America, North America
Outcrop of Manhattan gneiss which forms bedrock for skyscrapers, Central Park, New York City, New York, United States of America (U.S.A.), North America
Travertine calcite deposits, Minerva Terrace, Mammoth Hot Springs and Terraces, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Colourful volcanic rock, Mount Tarawera, Rotorua, South Auckland, North Island, New Zealand, Pacific
View from the Rim, Grand Canyon of the Yellowstone River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Houses in rock formations, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Volcanic rock formations on south eastern coast, near Kleftiko, Milos, Cyclades islands, Greece, Mediterranean, Europe
Garibaldi Glacier, Darwin National Park, Tierra del Fuego, Patagonia, Chile, South America
Whakarewarewa Thermal Park, Rotorua, North Island, New Zealand, Pacific
Death Vlei, Namib Naukluft Park, Namibia, Africa
Unusual weathered rock formation, the Olgas, Northern Territory, Australia, Pacific
Desert, Wadi Rum, Jordan, Middle East
Skogarfoss, Iceland, Polar Regions
Hierve el Agua (the water boils), hot springs, water rich in minerals bubbles up from the mountains and pours over edge, Oaxaca, Mexico, North America
The world's largest natural pitch lake, 90 meters deep, Trinidad, West Indies, Caribbean, Central America
The world's largest natural pitch lake, 90 meters deep, Trinidad, West Indies, Caribbean, Central America
Double Arch in the Windows section of Arches National Park, Utah, United States of America, North America
Yesnaby Castle sea stack, rock eroded by the sea, Mainland, Orkney Islands, Scotland, United Kingdom, Europe
Basaltic cliffs dominating Raasay Sound, east coast of Skye, Trotternish, Isle of Skye, Inner Hebrides, Scotland, United Kingdom, Europe
Hot mud, Vulcanetti di Macalube, Sicily, Italy, Europe
The Grand Canyon viewed from Mather Point, UNESCO World Heritage Site, Arizona, United States of America, North America
Examining dinosaur tracks, Broome, Kimberley, Western Australia, Australia, Pacific
Rock forms, Broome, Kimberley, Western Australia, Australia, Pacific
Thor's Hammer, Bryce Canyon National Park, Utah, United States of America, North America
Mount Bromo, Java, Indonesia, Southeast Asia, Asia
Mountain Karla Marxa, 6723m, Shokh Dara Valley, Tajikistan, Central Asia, Asia
Unique rock formation in the Organ Pipes National Park, Victoria, Australia, Pacific
Red Tsingys, strange looking sandstone formations, near Diego Suarez (Antsiranana), Madagascar, Africa
Coral formations, Tsingy de Bemaraha, UNESCO World Heritage Site, Madagascar, Africa
Little mounds in the Black desert, Egypt, North Africa, Africa
Wind-eroded sculptures of calcium rich rock in The White Desert near Bahariya, Egypt, North Africa, Africa
Aerial view, Canyonlands National Park, Utah, United States of America, North America
West Temple, 7810 feet on left, and Sundial Tower, 7590 feet center rear, Zion National Park, Utah, United States of America, North America
Uluru (Ayers Rock), Uluru-Kata Tjuta National Park, UNESCO World Heritage Site, Northern Territory, Australia, Pacific
Dinosaur Trackway, Clayton Lake State Park, Clayton, New Mexico, United States of America, North America
Thingvellir, site of original 10th century Althingi (Parliament) and geographical rift between Europe and North America, Iceland, Polar Regions
Djupalonssandur beach, Snaefellsness National Park, Iceland, Polar Regions
Svartifoss waterfall with basalt columns in Skaftafell National Park, South area, Iceland, Polar Regions
Limestone cliffs on the coastline near Bonifacio, island of Corsica, France, Mediterranean, Europe
Cliffs towering over West Bay Beach, Dorset, England, United Kingdom, Europe
Reflections of a glacier in Chilean Fjordland, Magallanes, Chile, South America
Rock pinnacles in the Stone Forest in Yunnan Province, China, Asia
Hiker on bench, The Breithorn and Breithorn Glacier, Rotenboden, Zermatt, Valais, Switzerland, Europe
Small pool on rock, Ile Therese (Therese island), northwest coast, island of Mahe, Seychelles, Indian Ocean, Africa
Capo Boi, southeast coast, island of Sardinia, Italy, Mediterranean, Europe
Looking down from hot air balloon, near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
View from Roc des Hourtous of the Gorges du Tarn, Lozere, Languedoc-Roussillon, France, Europe
Ille-sur-Tete, Les Orgues, Pyrenees-Orientales, Languedoc-Roussillon, France, Europe
Green pool, lava mountains, El Golfo, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Volcanic tuff pillars and erosion, Pasabagi, Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Bourke's Luck potholes, Drakensberg Mountains, South Africa, Africa
Volcanic coastline, island of Sao Jorge, Azores, Portugal, Atlantic, Europe
Grand Canyon, from helicopter, UNESCO World Heritage Site, Arizona, United States of America, North America
Mount Teide (Pico de Teide), Teide National Park, Tenerife, Canary Islands, Spain, Atlantic, Europe
Mendocino Headlands, California, United States of America, North America
Hierve el Agua (the water boils), hot springs, Oaxaca, Mexico, North America
Norber erratics near Austwick, erratic boulders left on limestone pavement by erosion, Yorkshire Dales National Park, Yorkshire, England, United Kingdom, Europe
The world's largest natural pitch lake, 90 meters deep, Trinidad, West Indies, Caribbean, Central America
Pine tree on a slickrock face, Zion National Park, Utah, United States of America, North America
Aerial photo, Skeleton Coast Park, Namibia, Africa
Sheer cliffs 75m high of old red sandstone conglomerate, RSPB's Fowlsheug Bird and Nature Reserve, Crawton, Aberdeenshire, Scotland, United Kingdom, Europe
The Olgas, Uluru-Kata Tjuta National Park, UNESCO World Heritage Site, Northern Territory, Australia, Pacific
White travertine terraces at Pamukkale, UNESCO World Heritage Site, Anatolia, Turkey, Asia Minor, Eurasia
Rock archways at Praia do Camilo (Camel beach), Lagos, Algarve, Portugal, Europe
Fjallsarlon glacial lake and Fjallsjokull (Oraefajokull) glacier near Jokulsarlon glacial lagoon, south-east Iceland (Austurland), Iceland, Polar Regions
Stannage Edge, Hope Valley, Derbyshire, England, United Kingdom, Europe
Hverfjall volcano, Reykjahlid, Iceland, Polar Regions
Azure Window, Dwejra Bay, Gozo, Malta, Mediterranean, Europe
Waterfall in summer sunshine at Foss a Sidu, South coast, Iceland, Polar Regions