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Ruins of Pompeii, destroyed in volcanic eruption of AD 79, Pompeii, UNESCO World Heritage site, Campania, Italy, Europe
Late winter hikers on snowfield in South Crater on Tongariro Crossing, Tongariro National Park, UNESCO World Heritage Site, South Auckland, North Island, New Zealand, Pacific
View from Mount Ruapehu of Mount Ngauruhoe with a ski cottage in the foreground, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Woman on Mount Ruapehu looking towards Mount Ngauruhoe, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Aerial of a tuquoise crater lake on top of Mount Ruapehu, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Aerial of Mount Ngauruhoe, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Ski cottage on Mount Ruapehu, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Ski cottage on Mount Ruapehu, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Manjanggul Lava Tube, UNESCO World Heritage Site, Jeju Island, South Korea, Asia
Female tourist on boardwalk by the Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Manjanggul Lava Tube, UNESCO World Heritage Site, Jeju Island, South Korea, Asia
Petroglyphs at the archeological site of Orongo Ceremonial village high on the crater rim of Ranu Kau, Rapa Nui (Easter Island), UNESCO World Heritage Site, Chile, South America
Majestic night sky with Milky Way over a serene mountain landscape in the Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic, Europe
Volcanic landscape, Valle del Bove, Etna, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Volcanic landscape, Valle del Bove, Etna, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Manjanggul Lava Tube, UNESCO World Heritage Site, Jeju Island, South Korea, Asia
Natural pinnacles in volcanic ash, Zemi Valley, Goreme, UNESCO World Heritage Site, Cappadocia, Anatolia, Turkey, Asia Minor, Eurasia
Natural pinnacles in volcanic ash, Zemi Valley, Goreme, UNESCO World Heritage Site, Cappadocia, Anatolia, Turkey, Asia Minor, Eurasia
The volcanic mountain chain of the Virunga National Park after the rain, UNESCO World Heritage Site, Democratic Republic of the Congo, Africa
The volcanic mountain chain of the Virunga National Park, UNESCO World Heritage Site, Democratic Republic of the Congo, Africa
View of Aeolian Islands archipelago from Gran Cratere, Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe
Volcanic beach, Stromboli, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe
People walking on Gran Cratere rim, Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe
People walking on Gran Cratere rim, Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe
Volcanic landscape, Mount Etna, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Volcanic landscape, Etna, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Ancient cave dwellings in the tufa formations at Goreme Open Air Museum, Goreme, UNESCO World Heritage Site, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Etna South, Mount Etna, UNESCO World Heritage Site, Catania, Sicily, Italy, Europe
The lagoon with the world's most southerly coral reef, at this 10km long volcanic island in the Tasman Sea, Lord Howe Island, UNESCO World Heritage Site, New South Wales, Australia, Pacific
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Old Settlement Bay and Mount Lidgbird on left and Mount Gower by the lagoon with the world's most southerly coral reef, volcanic island in the Tasman Sea, Lord Howe Island, UNESCO World Heritage Site, New South Wales, Australia, Pacific
View of Aeolian Islands archipelago from Gran Cratere, Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe
Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Eroded calcarenite rock (cemented coral sands) with Mount Lidgbird and Mount Gower by the lagoon with the world's most southerly coral reef, on this 10km long volcanic island in the Tasman Sea, Lord Howe Island, UNESCO World Heritage Site, New South Wales, Australia, Pacific
Endemic kentia palms that are also cultivated for worldwide sale with Mount Lidgbird on the left and Mount Gower by the lagoon with the world's most southerly coral reef, on this 10km long volcanic island in the Tasman Sea, Lord Howe Island, UNESCO World Heritage Site, New South Wales, Australia, Pacific
Road leading to Mount Ngauruhoe, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Goreme, UNESCO World Heritage Site, Cappadocia, Anatolia, Turkey, Asia Minor, Eurasia
Etna South, Mount Etna, UNESCO World Heritage Site, Catania, Sicily, Italy, Europe
The volcanic mountain chain of the Virunga National Park, UNESCO World Heritage Site, Democratic Republic of the Congo, Africa
Female tourist on boardwalk by the Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Ruins of pre-Spanish Mahos village, Poblado de la Atalayita, Pozo Negro, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Pinnacles of volcanic ash, Urgup, UNESCO World Heritage Site, Cappadocia, Anatolia, Turkey, Asia Minor, Eurasia
Etna South, Mount Etna, UNESCO World Heritage Site, Catania, Sicily, Italy, Europe
Jungman Daepo columnar jointed lava formation, Seogwipo, Jeju Island, UNESCO World Heritage Site, South Korea, Asia
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Hikers are dwarfed by the volcanic Mount Ngauruhoe on the Tongariro Crossing trail, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Lava flowing from Kilauea Volcano, Hawaii Volcanoes National Park, UNESCO World Heritage Site, The Big Island, Hawaii, United States of America, North America
Aerial of the crater of Mount Ngauruhoe, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Road leading to Mount Ruapehu, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Crested Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
El Teide, Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Europe
The Volcanic Tongariro Crossing, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Aerial of Mount Ngauruhoe, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Tourists on the boardwalk around the Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Roques de Garcia, Caldeira de las Canadas, Mount Teide, Mount Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic Ocean, Europe
Lava and ash floes in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
Great Theater of Pompeii, archaeological site of ancient city destroyed by Mount Vesuvius volcanic eruption, UNESCO World Heritage Site, near Naples, Campania, Italy, Europe
El Teide National Park, UNESCO World Heritage Site, Tenerife, 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
Guests from the Lindblad Expedition ship National Geographic Endeavour in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Lava lizard (Microlophus spp) in the Galapagos Island Archipelago, 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
Pinnacle Rock on Bartolome Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
The archaeological ruins of Pompeii, UNESCO, Campania, Italy
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
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
People and continental drift of North American and Eurasian tectonic plates, Thingvellir National Park in winter, UNESCO, Western Region, Iceland
Budhir Church, Snaefellsness Peninsula, Iceland
Mount Teide, the third active largest volcano in the world and the tallest mountain in Spain, UNESCO World Heritage Site, Teide, Tenerife, Canary Islands, Spain, Atlantic, Europe
Filicudi Island, Aeolian Islands, UNESCO World Heritage Site, north of Sicily, Italy, Mediterranean, Europe
People walking through fumaroles on Volcano Gran crater rim, Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, north of Sicily, Italy, Mediterranean, Europe
Gran Cratere (The Great Crater) and Aeolian Islands view, Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, north of Sicily, Italy, Mediterranean, Europe
Bathers enjoying the therapeutic benefits of the volcanic mud in the hot spring pool, Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, north of Sicily, Italy, Mediterranean, Europe
Tiede National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Europe
View over Lava field in Sullivan Bay towards Bartolome Island, Santiago (James) Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America
View of El Teide volcano shadow and full moon from the summit right before the sunrise, El Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic, Europe
Red Crater and Mount Ngauruhoe in Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Pompeii, UNESCO World Heritage Site, archaeological site of ancient city destroyed by Mount Vesuvius volcanic eruption, near Naples,Campania, Italy, Europe
Furnas Valley, a site of bubbling hot springs and fumaroles on the Azorean capital island of Sao Miguel, Azores, Portugal, Europe
Mount Vesuvius, a volcano located on the Bay of Naples about 9km from the city of Naples, Campania, Italy
Woman responsible for ensuring visitor safety and good behavior at the Viewpoint, Harrat volcanic plateau, AlUla, Medina Province, Saudi Arabia
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
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
The archaeological ruins of Pompeii with Mount Vesuvius in the background, UNESCO, Campania, Italy
Lava bombs erupt from one of many vents on volcano, active for at least 2000 years, Stromboli, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, 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
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
People walking on Gran Cratere rim, Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe
Volcanic landscape view on the far away Taranaki Volcano, viewed from Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
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
Bartolome Island with Pinnacle Rock, a volcanic plug, to the right, the location featured in the 2003 film Master and Commander, Galapagos islands, UNESCO World Heritage Site, Ecuador, South America
Aerial of a Volcanic crater outside, Goma, Democratic Republic of Congo, Africa
Pico Viejo, Caldeira de las Canadas, Mount Teide, Mount Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic Ocean, Europe
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South 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
Pompeii, UNESCO World Heritage Site, archaeological site of ancient city destroyed by Mount Vesuvius volcanic eruption, near Naples,Campania, Italy, Europe