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Tourists exploring White Island Volcano, an active volcano in the Bay of Plenty, North Island, New Zealand, Pacific

Acid Crater Lake, White Island Volcano, an active volcano in the Bay of Plenty, North Island, New Zealand, Pacific

Cotopaxi National Park, a large forested area known for the active, snow-capped Cotopaxi Volcano, Ecuador, South America

The crater with active lava lake of Mount Nyiragongo, Virunga National Park, UNESCO World Heritage Site, Democratic Republic of the Congo, Africa

Tourists exploring White Island Volcano, an active volcano in the Bay of Plenty, North Island, New Zealand, Pacific

Tourists exploring White Island Volcano, an active volcano in the Bay of Plenty, North Island, New Zealand, Pacific

Tourists watching Mount Bromo, an active volcano, erupting in East Java, Indonesia, Southeast Asia, Asia

An active andesite stratovolcano on White Island, off the east side of North Island, New Zealand, Pacific

View from Tierser Alpl refuge of Langkofel and Plattkofel, Dolomites, eastern Alps, South Tyrol, Bolzano province, Italy, Europe

Lava flow from the Monti Calcarazzi fissure that threatened Nicolosi on the south flank of Mt. Etna, Sicily, Italy, EuropeThe Piano del Lago cone (above) destroyed the Sapienza cable car.

Fagradalsfjall volcano, active vent during the eruption of July 2021, Reykjanes Peninsula, Iceland, Polar Regions

A climber tackles a severely overhanging route in the caves of 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

Guests from the Lindblad Expedition ship National Geographic Explorer kayaking in the Svalbard Archipelago, Norway, Arcitc, Europe

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

Three hikers at foot of Tre Cime di Lavaredo (Three Peaks of Lavaredo), Three Peaks Nature Park, Dolomites, UNESCO, South Tyrol, Italy

Woman running on edge of swimming pool of Our Habitas AlUla, resort in ancient oasis in desert canyon, Ashar Valley, Medina Province, Saudi Arabia

Panoramic aerial view of the active Erta Ale volcano caldera, Danakil Depression, Afar Region, Ethiopia, Africa

Panoramic aerial view of sunset over the active Erta Ale volcano crater, Danakil Depression, Afar Region, Ethiopia, Africa

Electric mountain biker off the road from Zagora to the south (N 9), Draa River valley, Province of Zagora, Region Draa-Tafilalet, Morocco

Electric mountain bike rider on track between Ouarzazate and Ait Ben Haddou, Ounila River valley, Ouarzazate Province, Draa-Tafilalet region, Morocco

Electric mountain bike rider on track between Ouarzazate and Ait Ben Haddou, Ounila River valley, Ouarzazate Province, Draa-Tafilalet, Morocco

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

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

The peak of Mount Lokon, a stratovolcano with Tompaluan active crater on its flank, near Tomohon city, Gunung Lokon, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia

Cabbages growing in fertile volcanic soil fields near Mount Mahawu, an active stratovolcano near Tomohon city. Gunung Mahawu, Tomohon, North Sulawesi, Indonesia

Sulphur and other minerals at an active fumarole field by Lake Linow, a volcanic attraction south of Tomohon city, Lake Linow, 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

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

Cyclists on the Grand Fondo La Marmotte, Col du Glandon, Savoie, Auvergne Rhone-Alpes, France, Europe

Hiker at the foot of the Tre Cime di Lavaredo (Three Peaks of Lavaredo), Three Peaks Nature Park, Dolomites, UNESCO, South Tyrol, Italy

Stress cracks in the skin of a large fallen lava bomb near Mount Lokon, an active stratovolcano, near Tomohon city, Gunung Lokon, 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

Sulphur and other minerals at an active fumarole field by Lake Linow, a volcanic attraction south of Tomohon city, Lake Linow, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia

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

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

Hiking in front of Tre Cime di Lavaredo, Dolomites, eastern Alps, South Tyrol, Bolzano province, Italy, Europe

Tourists departing on a boat trip from Kalea Beach with active Karangetang volcano beyond, Kalea, Siau Island, Sangihe Archipelago, North Sulawesi, Indonesia, Southeast Asia, Asia

Outrigger canoe moored on Kalea Beach with active Karangetang volcano beyond, Kalea, Siau Island, Sangihe Archipelago, North Sulawesi, Indonesia, Southeast Asia, Asia

Bike riders in front of the Auberge-restaurant in the village of Telouet, Ouarzazate Province, region of Draa-Tafilalet, Morocco

Bike rider off the road from Telouet to Ait Ben Haddou, Ounila River valley, Ouarzazate Province, region of Draa-Tafilalet, Morocco

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

Cabbages growing in fertile volcanic soil fields near Mount Mahawu, an active stratovolcano near Tomohon city. Gunung Mahawu, Tomohon, North Sulawesi, Indonesia

Mount Soputan, an active 1785m stratovolcano that can produce pyroclastic flows and ash clouds, SW of Tomohon, Gunung Soputan, Tomohon, North 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

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

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

Kids on a SUP in the turquoise waters of the Formentor Peninsula, Mallorca, Balearic islands, Spain, Mediterranean, Europe

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

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

Climber makes her way up one of the rock faces of the celebrated Mascun Gorge, Sierra de Guara mountains, Aragon, Spain

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

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