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Scenery in the valley of Ribeira de Cruz, northwest Saint Anthony, Cape Verde
Sheep grazing on remote Heimaey Island, Iceland
A view of the boiling mud at Namafjall, Iceland
View of the mountains of Vestrahorn from black volcanic sand beach after snowfall, Stokksnes, South Iceland, Iceland, Polar Regions
Aerial image of Eystrahorn mountain in winter, South Iceland, Iceland, Europe
A Large Cactus in a lava field in Lanzarote in the Canary Islands, Spain
The Caldera de Gairia volcanic cone looms over this town in the central south, Tiscamanita, Fuerteventura, Canary Islands, Spain, Europe
Volcanic landscape of the Masaya caldera, Nicaragua's first national park, with craters and a'a blocky lava, Masaya, Nicaragua, Central America
Geysers del Tatio (El Tatio), the third largest geyser field in the world, Andean Central Volcanic Zone, Antofagasta Region, Chile, South America
The Geldingadalir Volcanic Eruption, Fagradalsfjall, Iceland, Polar Regions
Vast arid volcanic landscape before sunrise, on high plateau of Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Oia village and red volcanic rocks, Oia, island of Santorini (Thira), Cyclades Islands, Greek Islands, Greece, Europe
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
Human shadows on the lava formation and rock forms on the island of Bartolome in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
El Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic, Europe
El Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic, Europe
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) on Espanola Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Guest from the Lindblad Expedition ship National Geographic Endeavour in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Natural volcanic rock swimming pools at sunset, Porto Moniz, Madeira, Portugal, Atlantic, Europe
Adult San Esteban spiny-tailed iguana (Ctenosaura conspicuosa), endemic to Isla San Esteban, Baja California, Mexico, North America
Kicker Rock, a volcanic formation near the island of San Cristobal, a popular spot for snorkelling, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
The recent re-eruption of Mount Fagradalsfjall and Geldingadalir Volcano, Southwest Peninsula, Iceland, Polar Regions
Mountainscape viewed from the top of Harrat volcanic plateau, AlUla, Medina Province, Saudi Arabia
Volcanic scenery in the valley of Alto Mira, northwest Saint Anthony, Cape Verde
People walking on the edge of the crater of Mount Vesuvius, Province of Naples, Campania region, Italy, Europe
Volcanic tunnel, Caldeira, Graciosa Natural Park, Graciosa Island, Azores, Portugal, Atlantic, Europe
Tourists visiting Lava field in Sullivan Bay, Santiago (James) Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America
Sulphur deposits in a piece of lava rock on the slopes of Mount Lokon volcano near Tomohon city, Gunung Lokon, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia
Volcanic rock split, Darya Ajdahar (Valley of the Dragon), Bamyan, Afghanistan, Asia
El Tatio Geysers, at 4300m above sea level El Tatio is the world's highest geyser field, the area is ringed by volcanoes and fed by 64 geysers, Atacama Desert, Norte Grande, Chile, South America
Lava lizard (Microlophus spp) in the Galapagos Islands Archipelago, UNESCO World Heritage Site, Ecuador, South America
El Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic, Europe
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
Rock formations in Guejar Sierra, Sierra Nevada, Granada, Andalusia, Spain, Europe
Kicker Rock, a volcanic formation near the island of San Cristobal, a popular spot for snorkelling, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Smoke emission out of Erta Ale volcano caldera, Danakil Depression, Afar Region, Ethiopia, Africa
View from Calderon Honda crater of lava rock ruins and volcanic cones of the north, Lajares, Fuerteventura, Canary Islands, Spain, Europe
Hverfell Crater rising out of the Dimmuborgir Lava Field, Myvatn Region, Iceland, Polar Regions
Pato Beach, Puerto de la Cruz, Tenerife Island, Canary Islands, Spain, Atlantic, Europe
Paisaje Lunar, rock formation, The Moon Landscape, Vilaflor, Tenerife Island, Canary Islands, Spain, Europe
Natural salt water swimming pools made of volcanic rock, Porto Moniz, Madeira island, Portugal, Atlantic, Europe
Sign on road with stratified volcanic rocks in the background, Parque Nacional del Teide, Tenerife, Canary Islands, Spain, Atlantic, Europe
View over the west coast near Mirador de Balcon, La Aldea de San Nicolas; Gran Canaria, Canary Islands, Spain, Atlantic, Europe
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
A view of the lava formation and rock forms on the island of Bartolome in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Aerial view of hot air balloon over rock formations in Love Valley at sunrise, Goreme, Goreme Historical National Park, UNESCO World Heritage Site, Cappadocia, Central Anatolia Region, Anatolia, Turkey, Asia Minor, Asia
Galapagos sea lion (Zalophus wollebaeki) resting on lava at sunset in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
Coastal swimming pools near mountains at Porto da Cruz, Machico District, Madeira, Portugal, Atlantic, Europe
Yellow-footed gull (Larus livens), on its nest on Isla Coronado, Baja California Sur, Sea of Cortez, Mexico, North America
Injured juvenile yellow-footed gull (Larus livens), on Isla Coronado, Baja California Sur, Sea of Cortez, Mexico, North America
Aerial view of volcanic rocks of Pico de la Zarza mountain peak during a misty sunrise, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Randecker Maar, former volcanic pipe, Ochsenwang, Swabian Alps, Baden-Wurttemberg, Germany, Europe
The recent re-eruption of Mount Fagradalsfjall and Geldingadalir Volcano, Southwest Peninsula, Iceland, Polar Regions
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) on Espanola Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Geologists taking minerals samples on Gran Cratere (The Great Crater), Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, north of Sicily, Italy, Mediterranean, Europe
The Geldingadalir Volcanic Eruption, Fagradalsfjall, Iceland, Polar Regions
View along the slope and hiking trail up towards the Red Crater Volcano, on Tongariro Alpine Crossing, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Volcanic landscape, Pointe de Capelinhos (Capelinhos Point), Faial island, Azores, Portugal, Europe, Atlantic Ocean
Volcanic rock formations at Sarakiniko on north coast, Sarakiniko, Milos, Cyclades, Aegean Sea, Greek Islands, Greece, Europe
Imerovigli village perched on red volcanic hill, island of Santorini (Thira), Cyclades, Greek Islands, Greece, Europe
Grand Prismatic Spring and Excelsior Pool behind, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Volcanic cone, Seongsan Ilchulbong (Sunrise Point) on Jeju Island, UNESCO World Heritage Site, South Korea, Asia
Sierra Negra Volcano, Highlands of Isabela (Albemarle) Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America
Adult Andean fox (Lycalopex culpaeus) near its den in the Andean Central Volcanic Zone, Antofagasta Region, Chile, South America
Path to Laguna Miscanti, a brackish lake at an altitude of 4140 meters in the Andean Central Volcanic Zone, Chile, South America
The Geldingadalir Volcanic Eruption, Fagradalsfjall, Iceland, Polar Regions
The Geldingadalir Volcanic Eruption, Fagradalsfjall, Iceland, Polar Regions
The Geldingadalir Volcanic Eruption, Fagradalsfjall, Iceland, Polar Regions
Tourists around the steam jets at Namaskard thermal area, Hverarond, near Lake Myvatn, North area, Iceland, Polar Regions
Volcanic landscape, Mauna Loa, Hawaii Volcanoes National Park, UNESCO World Heritage Site, Big Island, Hawaii, United States of America, North America
Pinnacle Rock, a volcanic plug on Bartolome Island, one of the most spectacular features of the Galapagos islands, UNESCO World Heritage Site, Ecuador, South America
The recent re-eruption of Mount Fagradalsfjall and Geldingadalir Volcano, Southwest Peninsula, Iceland, Polar Regions
Gran Cratere (The Large Crater), Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, north of Sicily, Italy, Mediterranean, Europe
Sulphur and fumarole smoke on volcano Gran crater, Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, north of Sicily, Italy, Mediterranean, Europe
Volcanic rock formations on the shores of White Lake, Tariat district, North Hangay province, Mongolia, Central Asia, Asia
Reflecting pools and volcanic basalt rock boulders in the water, Devil Dog Canyon, near Drake, Arizona, United States of America, North America
Volcanic salt rocks, Dallol, Danakil Depression, Afar Region, Ethiopia, Africa
Panoramic of sunset over the fumarole of Erta Ale volcano, Danakil Depression, Afar Region, Ethiopia, Africa
Sulphur and fumaroles smoke on volcano Gran Cratere, Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, north of Sicily, Italy, Mediterranean, Europe
Haleakala National Park, volcanic landscape at sunrise, Maui Island, Hawaii, United States of America, North America
Panoramic of Erta Ale volcano at sunset, Danakil Depression, Afar Region, Ethiopia, Africa
Natural pools formed by volcanic lava filled with crystal-clear sea water, Porto Moniz, Madeira island, Portugal, Atlantic, Europe
Sign on a road with volcanic stratified rocks in the background, Parque Nacional del Teide, Tenerife, Canary Islands, Atlantic, Spain, Europe
Volcanic beach on southern coast, Paleokori (Paleohori), island of Milos, Cyclades, Greek Islands, Greece, Europe
Path to Laguna Miscanti, a brackish lake at an altitude of 4140 meters in the Andean Central Volcanic Zone, Chile, South America
Volcanic rocks and Oia village, Oia, Santorini (Thira), Cyclades Islands, Greek Islands, Greece, Europe
Rust-colored volcanic tuff cliffs of Brown Bluff, eastern side of the Tabarin Peninsula, Weddell Sea, Antarctica, Polar Regions
La Pared surf beach and the Parque Natural Jandia mountains beyond on the southwest coast, La Pared, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Volcanic rock formations at Sarakiniko on north coast, Sarakiniko, Milos, Cyclades, Aegean Sea, Greek Islands, Greece, Europe
Eldborg volcanic crater, declared a Protected Natural Monument in 1974, Iceland, Polar Regions
Ubehebe Crater, a volcanic crater half a mile across and 600 feet deep, Death Valley National Park, California, United States of America, North America
View of Gran Cratere and Finicudi Island, Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, north of Sicily, Italy, Mediterranean, Europe
Caleta Negra (Black Bay) a popular boat trip and walk with its distinctive sedimentary and lava strata, Ajuy, Fuerteventura, Spain, Atlantic, Europe
Teide Mountain covered with snow and Roques de Garcia, Teide National Park, UNESCO World Heritage Site, Tenerife Island, Canary Islands, Spain, Europe
Clear turquoise sea and volcanic rock formations at Sarakiniko, Sarakiniko, Milos, Cyclades, Aegean Sea, Greek Islands, Greece, Europe
Civita di Bagnoregio, a medieval town perched on volcanic rock, just before sunrise, Lazio, Italy, Europe