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Detail of an Agave plant on the volcanic 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

View over Roque Bentayga to Teide on Tenerife, Gran Canaria, Canary Islands, Spain, Atlantic, Europe

Lava lizard (Microlophus spp) in the Galapagos Islands 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

Adult red-footed booby (Sula sula) in flight in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Rempart river gorges viewed from the belvedere Nez-de-Boeuf on the road to Piton de la Fournaise, Reunion

The interior beauty of Jameos del Agua with a ray of light, Haria, Las Palmas, Lanzarote, Canary Islands, Spain, Atlantic, Europe

The endemic Galapagos marine iguana (Amblyrhynchus cristatus) on Espanola Island in the Galapagos Islands, 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

Volcanic cone, Seongsan Ilchulbong (Sunrise Point) on Jeju Island, UNESCO World Heritage Site, South Korea, Asia

Tourists photographing a wild Galapagos giant tortoise (Geochelone elephantopus) feeding on the upslope grasslands of Santa Cruz Island, Galapagos, UNESCO World Heritage Site, Ecuador, South 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

Boardwalk to Faro de Morro Jable on the volcanic Island of Fuerteventura, Canary Islands, Spain, Atlantic, Europe

Pinnacle Rock on Bartolome Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Adult rockhopper penguins (Eudyptes chrysocome chrysocome) at breeding and molting colony on New Island, Falkland Islands

Lava bombs erupt from multiple vents on volcano, active for at least 2000 years, Stromboli, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe

view of Volcanoes and the Volcanic landscape with the Atlantic Ocean in the Timanfaya national park in Lanzarote in the Canary Islands, Spain

Volcanic landscape with small plants in the Timanfaya national park in Lanzarote in the Canary Islands, Spain

Gran Cratere and Aeolian Islands view, Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, north of Sicily, Italy, Mediterranean, Europe

Geologists taking minerals samples on Gran Cratere (The Great Crater), Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, north of Sicily, Italy, Mediterranean, Europe

View of sign at entrance to Timanfaya National Park, Lanzarote, Las Palmas, Canary Islands, Spain, Atlantic, Europe

Ice covered Cook Island, a volcanic island in the South Sandwich Islands, South Atlantic, Polar Regions

Kalea Beach sunset with palm tree, canoe and Karangetang volcano, Kalea, Siau Island, Sangihe Archipelago, North Sulawesi, Indonesia, Southeast Asia, Asia

Aerial view of Caldera Colorada at sunset, Tinajo, Las Palmas, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Sunrise above the Emerald Lakes, view from red crater, 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

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

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

Turquoise and yellow green Emerald Lake in front of the Tongariro Volcano, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

The volcanic lake Lagoa do Congro with its emerald water, Sao Miguel Island, Azores Islands, Portugal, Atlantic, Europe

Small fishing boats on Playa Ajuy on the volcanic island of Fuerteventura, Canary Islands, Spain, Atlantic, Europe

Lava lizard (Microlophus spp) courtship behavior in the Galapagos Islands 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

Great frigatebird (Fregata minor) feeding on erupting green sea turtle (Chelonia mydas) hatchlings in the Galapagos, UNESCO World Heritage Site, Ecuador, South America

Volcano trekking, Stromboli, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe

Pinnacle Rock on Bartolome Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Sulphur and fumaroles smoke on volcano Gran Cratere, 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

Sierra Negra Volcano, Highlands of Isabela (Albemarle) Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Sunset over the volcanic islands of Santorini and Anastasi Orthodox Church at sunset, Fira, Santorini, Cyclades, Greek Islands, Greece, Europe

Natural salt water swimming pools made of volcanic rock, Porto Moniz, Madeira island, Portugal, Atlantic, Europe

The remains of an old whaling station at Deception Island, an active volcano which last erupted in 1969, Antarctica, Polar Regions

Icebergs surround the glacier covered volcano called Peter I Island in the Bellingshausen Sea, Antarctica, Polar Regions

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

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

Colorful scrub fields in front of Ngauruhoe Volcano and Pukekaikiore in 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

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

Volcanic rock formations at Sarakiniko on north coast, Sarakiniko, Milos, Cyclades, Aegean Sea, Greek Islands, Greece, Europe

Haleakala National Park, volcanic landscape at sunrise, Maui Island, Hawaii, United States of America, North 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

The endemic Galapagos marine iguana (Amblyrhynchus cristatus), foot detail, Espanola Island in the Galapagos Islands, 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

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

Adult San Esteban spiny-tailed iguana (Ctenosaura conspicuosa), endemic to Isla San Esteban, Baja California, Mexico, North America

Injured juvenile yellow-footed gull (Larus livens), on Isla Coronado, Baja California Sur, Sea of Cortez, Mexico, North America

Windsurfer off El Cotillo beach on the volcanic island of Fuerteventura, Canary Islands, Spain, Atlantic, Europe

View of landscape, Volcano La Corona and Maguez at sunset, Maguez, Lanzarote, Las Palmas, Canary Islands, Spain, Atlantic, Europe

Sunset over the volcanic islands of Santorini and Anastasi Orthodox Church at sunset, Fira, Santorini, Cyclades, Greek Islands, Greece, Europe

Penguins walk across the glacier on Thule Island, a volcanic island in the South Sandwich Islands, South Atlantic, Polar Regions

Winding road crossing the volcanic landscape towards Sicasumbre Astronomical Observatory, Fuerteventura, Canary Islands, Spain, Atlantic, Europe

Rough volcanic mountains with the blue ocean in background from Sicasumbre viewpoint, Fuerteventura, Canary Islands, Spain, Atlantic, Europe

High angle view of barren mountains in the mist from Sicasumbre Astronomical viewpoint, Fuerteventura, Canary Islands, Spain, Atlantic, Europe

Grassy fields in front of the towering slopes of Mount Taranaki, electric grid, 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

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

Red Crater and Mount Ngauruhoe in 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

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

View of Lake Toya, framed by autumn trees in the evening, and volcanic island in the middle of the lake, Abuta, Hokkaido, Japan, Asia

Volcanic landscape, Pointe de Capelinhos (Capelinhos Point), Faial island, Azores, Portugal, Europe, Atlantic Ocean

Imerovigli village perched on red volcanic hill, island of Santorini (Thira), Cyclades, Greek Islands, Greece, Europe

Aerial view of volcanic landscape, Mauna Kea, Big Island, Hawaii, United States of America, North America