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View north across fields at Chichigalpa to Volcan San Cristobal at the northwest end of Nicaragua's chain of volcanoes, Nicaragua, Central America

Gorely volcano, tundra plants on slopes, summit crater rims on skyline, Kamchatka, East Siberia, Russia

Koryaksky volcano seen beyond walkers on crater rim of Avacha volcano, Kamchatka, East Siberia, Russia

Pigeon cotes cut in volcanic rock, apricot trees in foreground, Uchisar, Cappadocia, Turkey, Eurasia

Steam plume from active vent beside crater lake, Volcan Poas, Cordillera Central, Costa Rica, Central America

The top of the volcanic cone of Mount Ngauruhoe in the Tongariro National Park in the Wellington area of the North Island of New Zealand, Australasia

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

Tourists ascending recent volcanic cone, Penguin Island, South Shetland Islands, Antarctica, Polar Regions

Panoramic view of the town of Uchisar with its old houses and ancient cave dwellings in the volcanic tufa, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

Panoramic view of ancient cave dwellings in the volcanic tufa formations, Uchisar, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

Panoramic view of tufa formations near the town of Uchisar, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

Panoramic view of tufa formations, Valley of the Fairy Chimneys (Pasabag), near Zelve, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

Ancient cave dwellings in the tufa formations at Goreme Open Air Museum, Goreme, UNESCO World Heritage Site, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

Crater of Mount Eden with city beyond, Auckland, Central Auckland, North Island, New Zealand, Pacific

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

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

Salt pans and volcanoes in the background, near Yaiza, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Backpacker walking across dried up lake towards Llaima volcano, Conguillio National Park, Chile, South America

Rock climber attempts bouldering, and volcano in background, Conguillio National Park, Chile, South America

Bus and the famous El Nariz del Diablo (The Devil's Nose) train en route to Riobamba with Chimborazo volcano in the distance, Riobamba, Chimborazo Province, Central Highlands, Ecuador, South America

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

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

Cerro Catedral and Lago Toncek, Nahuel Huapi National Park, Bariloche, Patagonia, Argentina, South America

Tourists looking into the crater and view from the rim into the crater of Ranu Kau, Rapa Nui (Easter Island), Chile, South America

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

The west flank of 6310m Volcan Chimborazo, with its unique type of Andean high paramo (puna) made dry by the rain shadow, Chimborazo Province, Central Highlands, Ecuador, South America

Mimosa rocks and rock pool in natural bay composed of volcanic Rhyolite rock, around 360 million years old, Mimosa Rocks National Park, New South Wales, Australia, Pacific

Hiker in red jacket walking down new footpath across the volcanic landscape towards Madeira's third highest peak, Pico do Arieiro, Madeira, Portugal, Europe

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

Coastal landscape near Majanicho on north coast of Fuerteventura, Canary Islands, Spain, Atlantic, Europe

Jardin de Cactus designed by Cesar Manrique, Guatiza, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Cactus plants inside Jardin de Cactus designed by Cesar Manrique, Guatiza, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Haleakala Crater, in Haleakala National Park, Maui's dormant volcano, Hawaii, United States of America, Pacific, North America

Volcanic landscape, Valle del Bove, Etna, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe

Mud pots, fumaroles and dormant Volcan Santa Clara at the San Jacinto volcanic thermal area north of Leon, Leon, Nicaragua, Central America

Malpais badlands volcanic landscape looking northeast from Los Hervideros, Parque Natural Los Volcanes, near Yaiza, Lanzarote, Canary islands, Spain, Atlantic, Europe

Montana de Medio, mountain, Los Ajaches mountain range, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Malpais badlands volcanic landscape Montana Negra and Caldera Colorada, Parque Natural Los Volcanes, Masdache, Lanzarote, Canary islands, Spain, Atlantic, Europe

Grape vines growing in black volcanic pits in La Geria, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Grape vines growing in black volcanic soil in protected enclosed pits, La Geria, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Grape vines growing in black volcanic pits in La Geria, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Atlantic coast in south west corner, Los Charcones, Caleta Negra bay, near Playa Blanca, Lanzarote, Canary islands, Spain, Atlantic, Europe

View over whitewashed houses to Monte Corona volcano cone, village of Maguez, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Monumento a la Fecundidad by Cesar Manrique, Monumento al Campesino, San Bartolome, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Volcano crater and black volcanic farmland soil, near Tinajo, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Volcanic landscape, Mount Pico Partido, Parque Nacional de Timanfaya, national park, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Sign for Parque Nacional de Timanfaya, national park, designed by Cesar Manrique, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Food being cooked on volcanic grill at visitor centre, Parque Nacional de Timanfaya, national park, Lanzarote, Canary Islands, Atlantic, Europe

Walkway over lava field, Timanfaya Volcano Interpretation and Visitors' Centre, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Walkway over lava field, Timanfaya Volcano Interpretation and Visitors' Centre, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Close-up of plant, Cueva de Los Verdes, cave tourist attraction in lava pipe tunnel, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Starry night sky over a volcanic landscape with a colorful twilight gradient in Tenerife, Canary Islands, Spain, Atlantic, Europe

Landscape covered in volcanic ash and dust with the ash plume of the Eyjafjallajokull eruption in the distance, southern area, Iceland, Polar Regions

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

View from El Mirador del Rioi, La Graciosa island and El Rio channel, Chinjo archipelago natural park, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Cactus plants inside Jardin de Cactus designed by Cesar Manrique, Guatiza, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Jardin de Cactus designed by Cesar Manrique, Guatiza, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Volcano cone and black volcanic soil farmland, Monta Tinache, near Tinajo, Lanzarote, Canary Islands, Spain, Atlantic, Europe

El Triunfador sculpture, Fundación Cesar Manrique, Taro de Tahíche, Lanzarote, Canary islands, Spain, Atlantic, Europe

Road leading to cone of Mount Corona volcano and Ye village, Haria, Lanzarote, Canary Islands, Spain, Atlantic, Europe

View from Mirador del Rio of ferry ship approaching Caleta del Sebo, La Graciosa island, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Russian research ship Akademik Ioffe moored in the flooded volcanic caldera of Deception Island, South Shetland Islands, Antarctic Peninsula, Antarctica, Polar Regions

Tourists crossing the mountains that rim the volcanic caldera of Deception Island, South Shetland Islands, Antarctic Peninsula, Antarctica, Polar Regions

Volcanic desert landscape and its fabulous geographical structures caught in evening light, Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Eurasia

Cacti on Isla de los Pescadores, Volcan Tunupa and the salt flats, Salar de Uyuni, Southwest Highlands, Bolivia, South America

Cacti on Isla de los Pescadores, Volcan Tunupa and the salt flats, Salar de Uyuni, Southwest Highlands, Bolivia, South America