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Adult vicuna (Vicugna vicugna), in the Andean Central Volcanic Zone, Antofagasta Region, Chile, South America

Exploring a volcanic landscape on a footpath up Saxholl cinder cone and crater, Snaefellsjokull National Park, western Iceland, Polar Regions

Waves crashing on volcanic stone beach and sea stacks of Ilheus da Rib and Ribeira da Janela at sunrise, Madeira island, Portugal, Atlantic, Europe

The salt flats near Coqueza, a small town near the Thunupa Volcano, Salar de Uyuni, Daniel Campos Province, Bolivia, South America

The salt flats near Coqueza, a small town near the Thunupa Volcano, Salar de Uyuni, Daniel Campos Province, Bolivia, South America

Volcanic coastline with waves crashing into sea caves, Los Hervideros, Timanfaya National Park, Lanzarote, Canary Islands, Spain, Atlantic, Europe

A view of Candlemas Island, an uninhabited volcanic Island in the South Sandwich Islands, South Atlantic, Polar Regions

A view of Lucifer Hill on Candlemas Island, an uninhabited volcanic Island in the South Sandwich Islands, South Atlantic, Polar Regions

A view of Leskov Island, a volcanic island in the South Sandwich Islands, South Atlantic, Polar Regions

Majestic crater of Hondo volcano (Calderon Hondo) with the ocean in background, Corralejo, Fuerteventura, Canary Islands, Spain, Atlantic, Europe

Lovely Mahoro Island beach with Masare and Karangetang volcano beyond, Mahoro, Siau, Sangihe Archipelago, North Sulawesi, Indonesia, Southeast Asia, Asia

Bamburgh Castle, a medieval fortress, Grade I Listed Building constructed on top of a craggy outcrop of volcanic dolerite, overlooking a cricket ground, Bamburgh, Northumberland, England, United Kingdom, Europe

Bamburgh Castle, a medieval fortress, Grade I Listed Building constructed on top of a craggy outcrop of volcanic dolerite, overlooking a cricket ground, Bamburgh, Northumberland, England, United Kingdom, Europe

Bamburgh Castle, a fortress constructed on top of a craggy outcrop of volcanic dolerite in the Middle Ages, now a Grade I Listed Building, Bamburgh, Northumberland, England, United Kingdom, Europe

Bamburgh Castle, a hilltop fortress constructed on top of a craggy outcrop of volcanic dolerite, Grade I Listed Building, Bamburgh, Northumberland, England, United Kingdom, Europe

Grassy fields in front of the towering slopes of Mount Taranaki, electric grid, North Island, New Zealand, Pacific

Panoramic view of Mount Taraniki, snowy volcano summit with a blue sky and forest in the evening, North Island, New Zealand, Pacific

Walls of Tongariro Volcano lit by red sunrise, volcanic plains of New Zealand, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

Mount Ngauruhoe during sunrise and sunsrise on Mount Tongariro, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

Volcanic landscape view on the far away Taranaki Volcano, viewed from Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

Red sunrise on Mount Tongariro with volcanic plain in front, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

Mount Ngauruhoe during sunrise and sunsrise on Mount Tongariro, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

Morning light on the rugged volcanic slopes and the vast countryside of New Zealand Tongariro Crossing, North Island, New Zealand, Pacific

Red Crater and Mount Ngauruhoe in Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

Emerald Lakes at sunrise, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

Emerald Lakes at sunrise, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

Emerald lake on volcano slope, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

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

Shore of the Emerald Lake, natural vibrant colour gradient with view on the Red Crater Volcano of Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

Emerald Lake in Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

Purple hills of volcanic bentonite near Hamilili Point on the south end of Petrified Forest National Park, Arizona, United States of America, North America

The verdant slopes of the active Tungurahua Volcano that threatens the nearby town of Banos, Ambato Province, Central Highlands, Ecuador, South America

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

A young painted frogfish (Antennarius pictus) sits on the volcanic seafloor of Lembeh Strait, Indonesia.

Layers of lava flows and tuff from the dormant volcano on Isla Tortuga, Baja California, Sea of Cortez, Mexico, North America

Galapagos Land Iguana (Conolophus subcristatus), large lizard can can grow to five feet long and live for 60 years, South Plaza island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Furnas Valley, a site of bubbling hot springs and fumaroles on the Azorean capital island of Sao Miguel, Azores, Portugal, Europe

Bartolome Island with Pinnacle Rock, a volcanic plug, to the right, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Guests from the Lindblad Expedition ship National Geographic Endeavour in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Landscape around Wakan village, Western Al Hajar Mountains, border South Batinah and Al Dakhiliyah Governorates, Oman, Arabian Peninsula

Stepping stones above perpetually flowing water needed to cross streets and keep the way clear for carts, archaeological site of Pompeii, UNESCO World Heritage Site, province of Naples, Campania, Italy, Europe

Continental drift between North American and Eurasian tectonic plates, Thingvellir National Park, UNESCO, in winter, Western Region, Iceland

Continental drift between North American and Eurasian tectonic plates, Thingvellir National Park in winter, UNESCO, Western Region, Iceland

Continental drift between North American and Eurasian tectonic plates, Thingvellir National Park, UNESCO, in winter, Western Region, Iceland

View of the mountains of Vestrahorn from black volcanic sand beach after snowfall, Stokksnes, South Iceland, Iceland, Polar Regions

Lobos Island, a nature reserve and La Caldera volcano, just north of this resort, Corralejo, Fuerteventura, Canary Islands, Spain, Atlantic, Europe

The Giants Causeway, UNESCO World Heritage Site, County Antrim, Ulster, Northern Ireland, United Kingdom, Europe

Volcanic rock souvenirs, Lipari Island, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe

Lake in the Furna do Enxofre, volcanic cave, Caldeira, Graciosa Natural Park, Graciosa Island, Azores, Portugal, Atlantic, Europe

View of El Teide Volcano shadow from the summit at sunrise, El Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic, Europe

Tourists at the Geysers del Tatio (El Tatio), the third largest geyser field in the world, Andean Central Volcanic Zone, Antofagasta Region, Chile, South America

Adult vicuna (Vicugna vicugna), in the Andean Central Volcanic Zone, Antofagasta Region, Chile, South America

Calimani Mountains, the largest volcanic complex of the Carpathian Mountains in Transylvania, Romania, Europe

Salt workers near Coqueza, a small town near the Thunupa Volcano, Salar de Uyuni, Daniel Campos Province, Bolivia, South America

The salt flats near Coqueza, a small town near the Thunupa Volcano, Salar de Uyuni, Daniel Campos Province, Bolivia, South America

The salt flats near Coqueza, a small town near the Thunupa Volcano, Salar de Uyuni, Daniel Campos Province, Bolivia, South America

View over the volcanic landscape of Parque Natural de Los Volcanes, La Geria, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Interior, Municipal Palace, 17th century, with Frescoes, Atlixco, Pueblos Magicos, Puebla State, Mexico, North America

Steaming fumarole field at Bukit Kasih, a tourist volcanic park with a world peace themed tower and worship houses of five major religions, Bukit Kasih, Minahasa, North Sulawesi, Indonesia, Southeast Asia, Asia

Sunrise at the volcano slopes Red Crater, Tongariror Crossing, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

Panoramic view, crater of Blue Lake and Tongariro Volcano at sunrise, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

Aerial close up of a sunlit creek surrounded by volcanic ash, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

Close up of turquoise, vibrant Emerald Lake with steaming volcano, Tongariro Crossing, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

Close up of turquoise, vibrant Emerald Lake with steaming volcano on Tongariro Crossing, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

Vast arid volcanic landscape before sunrise, on high plateau of Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

Steam of the volcano on ashes and arid landscapes, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

Road across a volcanic crater, with small buildings in the distance, inland on the island of Sao Vicente, Republic of Cape Verde Islands, Atlantic, Africa

Mountain road crossing the volcanic landscape near Sicasumbre astronomical viewpoint, Fuerteventura, Canary Islands, Spain, Atlantic, Europe

Wind-surfer off Playa de La Barca, Costa Calma, on the volcanic island of Fuerteventura, Canary Islands, Spain, Atlantic, Europe

Two people at Mirador de Vallebron looking towards Tindaya volcano on the island of Fuerteventura, Canary Islands, Spain, Atlantic, Europe

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

Aerial view of the volcanic cone in eruption area near to Reykjavik, Icelandic southern coast, Iceland, Polar Regions