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Pieces of glacier ice washed up on black volcanic sand beach at sunrise, near Jokulsarlon Glacial Lagoon, South Iceland, Polar Regions

Winter sunset on black volcanic sand beach looking towards rock stacks of Reynisdrangar, Vik, South Iceland, Polar Regions

Dramatic light with view of the mountains of Vestrahorn from black volcanic sand beach at sunset, Stokksnes, South Iceland, Iceland, Polar Regions

Icebergs at sunrise on Jokulsarlon Beach, a black volcanic sand beach in South East Iceland, Iceland, Polar Regions

Volcanic peaks against deep blue sky, Jandia peninsula, Fuerteventura, Canary Islands, Spain, Atlantic, Europe

Glassy pieces of ice on volcanic black sand beach at sunrise, near Jokulsarlon Lagoon, South Iceland, Polar Regions

Avacha volcano, lava plug formed in crater in 1991, Koryaksky volcano beyond, Kamchatka, East Siberia, Russia

Mt Ngauruhoe volcano, beyond Red Crater, in the Tongariro National Park, Taupo, North Island, New Zealand

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

Volcanic boulders on Navajo sandstone, Grand Staircase-Escalante National Monument, Utah, United States of America, North America

Iceberg at sunrise on Jokulsarlon Beach, a black volcanic sand beach in South East Iceland, Iceland, Polar Regions

Coloured rocks at the volcanic crater, Deception Island, South Shetland Islands, Antarctica, Polar Regions

Volcano of Parinacola, 6348m high, reflected in water of Chungara Lake, Parque Nacional de Lauca, Chile, South America

Volcanic ash (tephra) crater Hverfjall (Hverfell), 140m deep, more than 1 km across, at Myvatn, northern Iceland, Iceland, Polar Regions

Petrohue Falls and Osorno Volcano, Vicente Perez Rosales National Park, Chilean Lake District, Chile, South America

Icebergs on a black sand volcanic beach next to the Jokulsarlon glacial lake in Vatnajokull National Park in southeast Iceland, Polar Regions

Pieces of glacier ice washed up on black volcanic sand beach at sunrise, near Jokulsarlon Glacial Lagoon, South Iceland, Polar Regions

Cruise ship anchoring in the volcanic crater of Deception Island, South Shetland Islands, Antarctica, Polar Regions

Fishing boat on Lake Toba (Danau Toba), the largest volcanic lake in the world, North Sumatra, Indonesia, Southeast Asia, Asia

Glassy pieces of ice on volcanic black sand beach at sunrise, near Jokulsarlon Lagoon, South Iceland, Polar Regions

Looking towards the sea stacks of Reynisdrangar at sunset from the black volcanic sand beach at Vik i Myrdal, South Iceland, Iceland, Polar Regions

Mount St. Helens, Mount St. Helens National Volcanic Monument, Washington state, United States of America, North America

Icebergs at sunrise on Jokulsarlon Beach, a black volcanic sand beach in South East Iceland, Iceland, Polar Regions

Aerial of Mount Ngauruhoe, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

Glassy pieces of ice on volcanic black sand beach at sunrise, near Jokulsarlon Lagoon, South Iceland, Polar Regions

Glassy pieces of ice on volcanic black sand beach at sunrise, near Jokulsarlon Lagoon, South Iceland, Polar Regions

Glassy pieces of ice on volcanic black sand beach at sunrise, near Jokulsarlon Lagoon, South Iceland, Polar Regions

Ice shelfs at the entrance of the volcanic island of Deception Island, South Shetland Islands, Antarctica, Polar Regions

Glassy pieces of ice on volcanic black sand beach with blurred waves, near Jokulsarlon Lagoon, South Iceland, Polar Regions

Eruptions at the Monti Calcarazzi fissure and the Piano del Lago cone, above, on Mount Etna that threatened tourist facilities and villages in 2001, Sicily, Italy, Europe

Mt Ngauruhoe, 2291m, youngest of the three volcanoes in the Tongariro National Park, North Island, New Zealand

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

Aerial view, Volcano in Parque Natural de los Volcanes, Timanfaya, Lanzarote, Canary Islands, Spain, Atlantic, Europe

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

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

Aerial view of El Golfo village and the volcanic landscape of Timanfaya National Park, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Snow covered frozen Viti (Hell) crater near Krafla power plant, Lake Myvatn, North area, Iceland, Polar Regions

Hot pools and boiling mud at Namaskard thermal area, Hverarond, near Lake Myvatn, North area, Iceland, Polar Regions

Leirhnjukur thermal area and eruption site near Krafla geothermal power station, Lake Myvatn, North area, Iceland, Polar Regions

Panoramic view of tufa formations, Devrent Valley (Pink Valley), near Zelve, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

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

Hikers, volcanic scenery and hiking trail, Kirishima National Park, Kagoshima prefecture, Kyushu, Japan, Asia

Caldera Colorado, volcanic landscape, Parque Nacional de Timanfaya, Lanzarote, Canary Islands, Spain, Europe

Exterior of old windmill in volcanic landscape, near Tiscamanita, Fuerteventura, Canary Islands, Spain, Europe

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

Fagradalsfjall volcano in July 2021, with typical lava advancing along the Natthagi valley, Reykjanes Peninsula, Iceland, Polar Regions

Looking towards the sea stacks of Reynisdrangar at sunrise from the black volcanic sand beach at Vik i Myrdal, South Iceland, Polar Regions

Fog shrouds the volcanic mountains surrounding Cova de Paul on Santo Antao Island, Cape Verde, Africa

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

Aerial view of El Golfo village and the volcanic landscape of Timanfaya National Park, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Mount Teide (Pico del Teide) from the south east outside Parador, Parque Nacional de Las Canadas del Teide (Teide National Park), Tenerife, Canary Islands, Spain, Europe

Traditional windmill and volcanic landscape, Tiagua, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Mountain road crossing the volcanic landscape near Sicasumbre astronomical viewpoint, 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

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

Man looking at volcanic landscape, Campo de Piedra Pomez, El Penon, Puna, Catamarca, Argentina. (MR)

Volcanic landscape, Hawaii silversword (Argyroxiphium sandwicense) endemic, Haleakala National Park, Maui Island, Hawaii, United States of America, North America

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

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

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

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

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

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

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

Volcanic landscape, Hawaii silversword (Argyroxiphium sandwicense) endemic, Haleakala National Park, Maui Island, Hawaii, United States of America, North America

Volcanic landscape, Hawaii silversword (Argyroxiphium sandwicense) endemic, Haleakala National Park, Maui Island, Hawaii, United States of America, North America

Aerial vertical view of old volcano and asphalt road, near to Myvatn lake on a summer day, Iceland, Polar Regions

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