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Tourists on Volcan Poas, the Active Crater of 2704m set in it's own National Park, Alajuela Province, Costa Rica

Men seated for breakfast at restaurant of The Thousand Nights Camp in Sharqiya Sands, formerly Wahiba Sands, desert region, Sultanate of Oman

Day view of Mount Vesuvius, the active volcano, seen from the Gulf of Napoli with buildings ashore, Naples, Campania, Italy, Europe

Fertile volcanic soil fields with Mount Lokon peak, an active stratovolcano beyond, near Tomohon city, Gunung Lokon, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia

Pickers bagging cabbages grown on fertile volcanic soil near Mount Mahawu, an active volcano near Tomohon city, Gunung Mahawu, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia

Active Stratovolcano, Mount Popocatepetl, 5393 meters high, Borders Mexico and Puebla States, Mexico, North America

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

Tomohon City, sited close to four volcanoes, two of them active, known for its flower festival and extreme' market, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia

Steaming fumaroles, sulphur and volcanic strata in Tompaluan active crater by Mount Lokon volcano near Tomohon city, Gunung Lokon, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia

Mount Sibayak, 2094m high, an active volcano in the Karo Highlands, North Sumatra, Sumatra, Indonesia, Southeast Asia, Asia

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

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

Mount Lokon volcano with Tompaluan active crater on the saddle between next door Mount Empung, near Tomohon city, Gunung Lokon, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia

Tomohon City, sited close to four volcanoes, two of them active, known for its flower festival and extreme' market, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia

A climber tackles a very difficult rock climb in the Gorge d'Aveyron, near St. Antonin and Gaillac, Massif Central, France

A rock climber tackles an overhanging crack in a sandstone wall on the cliffs of Indian Creek, a famous rock climbing area in Canyonlands National Park, near Moab, Utah, United States of America, North America

Steamboat Geyser, the worlds tallest active geyser, steaming in Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Mounts Lokon on the left, and Empung, with Tompaluan active crater on the saddle between, two volcanoes near Tomohon city, Gunung Lokon, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia

Japanese warning sign on the Crater rim of Mount Naka, an active volcano, Mount Aso, Kyushu, Japan, Asia

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

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

Smoking Karangetang, an active Pacific Ring of Fire volcano, Karangetang, Siau Island, Sangihe Archipelago, Sulawesi, Indonesia, Southeast Asia, Asia

Mount Mahawu, a stratovolcano and active 180m wide crater, with Lokon on the left, and Empung volcanoes beyond, Gunung Mahawu, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia

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

Steaming fumarole with sulphur deposits in Tompaluan active crater by Mount Lokon volcano near Tomohon city, Gunung Lokon, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia

A rock climber makes a first ascent of on the cliffs above the Llanberis Pass, Snowdonia National Park, Wales, United Kingdom

A climber tackles a steep and challenging route on the cliffs of the Aveyron Gorge, Aveyron region, Massif Central, France

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

Built in 1956, the Torre Latinoamericana, the world's first skyscraper built on a highly active seismic zone, Mexico City, Mexico, North America

Sulphurous fumaroles and volcanic strata in Tompaluan active crater on the flank of Mount Lokon, a volcano near Tomohon city, Gunung Lokon, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia Indonesia

Adult Adelie penguins (Pygoscelis adeliae) walking on first year sea ice in Active Sound, Weddell Sea, Antarctica, Polar Regionswhitening of whites, slight increase in contrast

A climber walking up a snowfield, Pico de Aneto, at 3404m the highest peak in the Pyrenees, Spain, Europe

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

The 1610m active Volcan Concepcion, greater of two volcanoes that form popular Omotepe Island (Isla Omotepe), Lake Nicaragua, Nicaragua, Central America

A climber on a route along the arch of El Delphin (The Dolphin) in the Mascun Gorge, Sierra de Guara mountains, Aragon, Spain

A rock climber tackles an overhanging wall on the cliffs of Indian Creek, a famous rock climbing area near Moab, south eastern Utah, United States of America, North America

Climbers on the glacier of Volcan Cotopaxi, at 5897m the highest active volcano in the world, Ecuador, South America

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

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

Smoking peak of this active 1784m Pacific Ring of Fire volcano. Mount Karangetang, Siau, Sangihe Islands, Sulawesi, Indonesia

Adult Adelie penguins (Pygoscelis adeliae) walking on first year sea ice in Active Sound, Weddell Sea, Antarctica, Polar Regions

The forested side of the 1610m active Volcan Concepcion seen from the east of the island, Isla Omotepe, Lake Nicaragua, Nicaragua, Central America

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

Smoke rises from the active crater of Tungurahua Volcano that threatens the nearby resort town of Banos, Ambato Province, Central Highlands, Ecuador, South America

The Sicilian landscape with the awe inspiring Mount Etna, UNESCO World Heritage Site and Europe's tallest active volcano, Sicily, Italy, Europe

Steamboat Geyser, the worlds tallest active geyser, steaming in Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

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

Small boat passing the awe inspiring Mount Etna, UNESCO World Heritage Site, and Europe's tallest active volcano, with Giardini Naxos, Sicily, Italy, Mediterranean, Europe

Polythene free zone sign showing India's active attempt to reduce plastic pollution, Mahaballipuram, Tamil Nadu, India, Asia

Sulphur smoke atop this active 1784m Pacific Ring of Fire volcano. Mount Karangetang, Siau, Sangihe Islands, Sulawesi, Indonesia

The awe inspiring Mount Etna, UNESCO World Heritage Site and Europe's tallest active volcano, seen from Taormina, Sicily, Italy, Mediterranean, Europe

The awe inspiring Mount Etna, UNESCO World Heritage Site and Europe's tallest active volcano, Sicily, Italy, Europe

Sulphur pieces on Iozan (sulfur mountain) active volcano area, Akan National Park, Hokkaido, Japan, Asia

A view of the old Bristol docks, no longer commercially active but a tourism attraction, seen from a hot-air balloon, Bristol, England, United Kingdom, Europe

Sulphur pieces on Iozan (sulfur mountain) active volcano area, Akan National Park, Hokkaido, Japan, Asia

The awe inspiring Mount Etna, UNESCO World Heritage Site and Europe's tallest active volcano, seen from Taormina, Sicily, Italy, Mediterranean, Europe

The awe inspiring Mount Etna, UNESCO World Heritage Site and Europe's tallest active volcano, Sicily, Italy, Europe

Tourists on rim of volcano, active in 1970, one of two in Antarctica, with cruise ship in the background, on Deception Island, Antarctic Peninsula, Antarctica, Polar Regions

Eruption of highly active Volcan Pacaya, a popular tourist sight south of Guatemala City, Guatemala, Central America

Eruption of highly active Volcan Pacaya, a popular tourist sight south of Guatemala City, Guatemala, Central America

Eruption of highly active Volcan Pacaya, a popular tourist sight south of Guatemala City, Guatemala, Central America

Smoke billowing out from volcano vent, Sulphur Lake, Kawah Ijen, Ijen Plateau, island of Java, Indonesia, Southeast Asia, Asia

The Pu'u O'o cinder cone, the active vent on the southern flank of the Kilauea volcano, UNESCO World Heritage Site, Big Island, Hawaiian Islands, United States of America, North America

The Pu'u O'o cinder cone, the active vent on the southern flank of the Kilauea volcano, UNESCO World Heritage Site, Big Island, Hawaiian Islands, United States of America, North America

Eruption of Gunung Merapi, a highly active volcano near Yogyakarta, Java, Indonesia, Southeast Asia, Asia

The Pu'u O'o cinder cone, the active vent on the southern flank of the Kilauea volcano, Big Island, Hawaii, Hawaiian Islands, United States of America, North America

Eruption of highly active Volcan Pacaya, a popular tourist sight south of Guatemala City, Guatemala, Central America

Tourists by green crater lake and fumaroles at Papandayan Volcano, an active four crater caldera, Garut, West Java, Java, Indonesia, Southeast Asia, Asia

The crater on Vulcano, Aeolian Islands, UNESCO World Heritage Site, island of Sicily, Italy, Mediterranean, Europe

Hikers exploring the very active hot spring area at Kerlingarfjoll, where Kerlingarfjoll Mountains in the interior are a massif of rhyolitic domes rising to 1477m, Iceland, Polar Regions

Third crater from the summit of Irazu, highest in Costa Rica at 3432m, last erupted 1994, Parque Nacional Volcan Irazu, Cartago, Costa Rica, Central America