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Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Devil's Thumb, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North  America
Mineral stained pond on collapsed flank of Papandayan Volcano, an active four crater caldera, Garut, West Java, Java, Indonesia, Southeast Asia, Asia
Royal Mineral Water Hospital, Old Bond Street, city of Bath, north east Somerset, England, UK
Stream through wildflowers, Mineral Basin, Uncompahgre National Forest, Colorado, United States of America, North America
Evaporation of sea water in salt pans, Museo de la Sal (Salt Museum), Las Salinas del Carmen, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Bands of light sand grains sorted from heavier dark minerals in intertidal zone at Playa Carrillo, Nicoya Peninsula, Costa Rica, Central America
Man collecting salt, Salir de Uyuni, salt flats, Bolivia, South America
Man collecting salt, Salir de Uyuni, salt flats, Bolivia, South America
Old gold mine buildings, Rodalquilar, Cabo de Gata natural park, Almeria, Andalusia, Spain, Europe
A mineralised ammonite fossil at the base of Burton Bradstock cliffs, Jurassic Coast, UNESCO World Heritage Site, Dorset England, United Kingdom, Europe
Cacti on Isla de los Pescadores, Volcan Tunupa and the salt flats, Salar de Uyuni, Southwest Highlands, Bolivia, South America
Salar de Uyuni is the largest salt flat in the world and is in South West Bolivia, Bolivia, South America
Cacti on Isla de los Pescadores, Volcan Tunupa and the salt flats, Salar de Uyuni, Southwest Highlands, Bolivia, South America
Details of the salt deposits in the Salar de Uyuni salt flat and the Andes mountains in the distance in south-western Bolivia, Bolivia, South America
Isla de los Pescadores and salt flats, Salar de Uyuni, Southwest Highlands, Bolivia, South America
Turquoise Pool, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Porcelain Basin, Norris Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Firehole Spring, Firehole Lake Drive, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Pool runoff of orange bacteria and algae (Therophiles), Grand Prismatic Pool, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Geologists taking mineral samples on Gran Cratere (The Great Crater), Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe
Minerals for sale to tourists as souvenirs on side of road in Tiz n Tichka Pass oer Atlas mountains, Morocco, North Africa, Africa
Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Tourists watching Old Faithful Geyser, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Young woman taking picture with her phone, Mineral de Pozos, Guanajuato, Mexico, North America
Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Cacti on Isla de los Pescadores and salt flats, Salar de Uyuni, Southwest Highlands, Bolivia, South America
Geologists taking mineral samples on Gran Cratere (The Great Crater), Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe
Cactus arrow on Isla de los Pescadores and the salt flats, Salar de Uyuni, Southwest Highlands, Bolivia, South America
Details of the salt deposits in the Salar de Uyuni salt flat, southwestern Bolivia, Bolivia, South America
Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Te Aroha Mineral Spas, Te Aroha, Waikato region, North Island, New Zealand, Pacific
Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
White-tailed Ptarmigan (Lagopus leucurus) among wildflowers, Mineral Basin, San Juan National Forest, Colorado, United States of America, North America
Cactus arrow on Isla de los Pescadores, Volcan Tunupa and the salt flats, Salar de Uyuni, Southwest Highlands, Bolivia, South America
Salar de Uyuni salt flats and the Andes mountains in the distance, Bolivia, South America
Cacti on Isla de los Pescadores and salt flats, Salar de Uyuni, Southwest Highlands, Bolivia, South America
Cacti on Isla de los Pescadores, Volcan Tunupa and the salt flats, Salar de Uyuni, Southwest Highlands, Bolivia, South America
A geothermal hotspring pool with dissolved minerals, Geysir, Golden Circle, Iceland, Polar Regions
Cacti on Isla de los Pescadores, Volcan Tunupa and the salt flats, Salar de Uyuni, Southwest Highlands, Bolivia, South America
Excelsior Geyser Crater, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Cacti on Isla de los Pescadores and the salt flats of Salar de Uyuni, Southwest Highlands, Bolivia, South America
A 4x4 on Salar de Uyuni, the largest salt flat in the world, South West Bolivia, Bolivia, South America
Boiling mudpools in geothermal area on Reykjanes Peninsula, near Keflavik, Iceland, Polar Regions
Llama and alpaca on salt flats, Salar de Uyuni, Southwest Highlands, Bolivia, South America
Cacti on Isla de los Pescadores and the salt flats of Salar de Uyuni, Southwest Highlands, Bolivia, South America
Cacti on Isla de los Pescadores and the salt flats of Salar de Uyuni, Southwest Highlands, Bolivia, South America
Geothermal Terraces with mineral deposit run off, Whakarewarewa thermal village, Rotorua, North Island, New Zealand, Pacific
Tourists on boardwalk over the mineral runoff from Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Cacti on Isla de los Pescadores and the salt flats of Salar de Uyuni, Southwest Highlands, Bolivia, South America
Cacti on Isla de los Pescadores and the salt flats, Salar de Uyuni, Southwest Highlands, Bolivia, South America
Landscape, Laguna Colorada, Bolivia, South America
Salt pans, St. Martin de Re, Ile de Re, Charente-Maritime, Poitou-Charentes, France, Europe
A 4x4 on Salar de Uyuni, the largest salt flat in the world, South West Bolivia, Bolivia, South America
Cacti at sunset on Isla de los Pescadores and salt flats, Salar de Uyuni, Southwest Highlands, Bolivia, South America
Old kilns for processing mercury, Mineral de Pozos (Pozos), a UNESCO World Heritage Site, Guanajuato State, Mexico, North America
Cascades with dwarf fireweed near Mineral Creek, Valdez, Alaska, United States of America, North America
Water rich in blue-green algae (cyanobacteria), mineral salts and fine silica mud at the geothermal spa that owes its existence to the Svartsengi geothermal power plant, Blue Lagoon, near Reykjavik, Iceland, Polar Regions
Water rich in blue-green algae (cyanobacteria), mineral salts and fine silica mud at the geothermal spa that owes its existence to the Svartsengi geothermal power plant, Blue Lagoon, near Reykjavik, Iceland, Polar Regions
Water rich in blue-green algae (cyanobacteria), mineral salts and fine silica mud at the geothermal spa that owes its existence to the Svartsengi geothermal power plant, Blue Lagoon, near Reykjavik, Iceland, Polar Regions
One of the Emerald Lakes, explosion craters filled with mineral-tinted water, on Mount Tongariro in the Tongariro National Park on the central plateau, North Island, New Zealand
Tourists on boardwalk over the mineral runoff from Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Old kilns for processing mercury, Mineral de Pozos (Pozos), a UNESCO World Heritage Site, Guanajuato State, Mexico, North America
Tidal sorting of white sand and darker minerals into patterns at the west coast Talisker Bay beach, known as a white and black sand beach, an SSSI for its Tertiary basalt lava geology, Talisker Bay, Carbost, Skye, Inner Hebrides, Scotland, United Kingdom, Europe
Tuzluca salt mine used for halotherapy, Tuzluca, Turkey, Asia Minor, Asia
Antique Roman thermal baths hot springs in Bagno Vignoni, Tuscany, Italy, Europe
High angle view of Maras salt marsh terraces, Salinas de Maras, Cuzco Region, Peru, South America
Pile of mined salt at Maras salt marsh terraces, Salinas de Maras, Cuzco Region, Peru, South America
Detail of salt pans of Maras, Salinas de Maras, Cuzco Region, Peru, South America
Aerial view of Las Salinas del Carmen salt flats, Fuerteventura, Canary Islands, Spain
Toxic green waters of Lake Ngakoro, Waiotapu Thermal Wonderland, New Zealand
Waiotapu Thermal Wonderland, North Island, New Zealand
Santa Laura Salpeter mine, UNESCO World Heritage Site, Atacama desert, Chile, South America
Volcanic cinder hills in Coconino National Forest, Arizona, USA
Grand Canyon, Duck on a rock viewpoint, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Salt ponds of Punjulharjo Village near Lasem, Java island, Indonesia, Southeast Asia, Asia
Salt fields at Karangjahe, near Lasem, Java island, Indonesia, Southeast Asia, Asia
February 11, 2008 - Dallol geothermal area, egg-shaped fumarole deposits formed in salt deposits of brine hot springs, Danakil Depression, Ethiopia.
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.
Technical diver in cave system, Mexico.
Diver using side mount gear in cave in Mexico.
Remnants of the Richinbar Mine within the Agua Fria National Monument, Black Canyon City, Arizona, USA
Open mine shaft at the Richinbar Mine within the Agua Fria National Monument, Black Canyon City, Arizona, USA
Lemons (Citrons), Campania region, southern Italy, Europe
The granite riverbed of the Agua Fria River Canyon in the Agua Fria National Monument of Arizona.
Petrified Waterfall at sunset, Hierve el Agua, San Lorenzo Albarradas, Oaxaca State, Mexico
Petrified Waterfall at dusk, Hierve el Agua, San Lorenzo Albarradas, Oaxaca State, Mexico
Petrified Waterfall at dusk, Hierve el Agua, San Lorenzo Albarradas, Oaxaca State, Mexico
Petrified Waterfall at dusk, Hierve el Agua, San Lorenzo Albarradas, Oaxaca State, Mexico
Petrified Waterfall at dusk, Hierve el Agua, San Lorenzo Albarradas, Oaxaca State, Mexico