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Three former volcanos, Roque de Agando, Degollada de Agando, Mirador de los Roques, La Gomera, Canary Islands, Spain, Europe
Rust-colored volcanic tuff cliffs above a dark material filled glacier at Brown Bluff, eastern side of the Tabarin Peninsula, Weddell Sea, Antarctica, Polar Regions
Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Europe
Coastline of Montserrat, British Overseas Territory, West Indies, Caribbean, Central America
View to the Tasman Sea over volcanic black sand beach at Piha, New Zealand's premier surfing resort, North Island, New Zealand, Pacific
Volcanic rock formations at Sarakiniko on north coast, Sarakiniko, Milos, Cyclades, Aegean Sea, Greek Islands, Greece, Europe
Los Roques de Garcia at Caldera de las Canadas, Pico de Teide at sunset, National Park Teide, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Europe
A view of the Pitons near Soufriere in St. Lucia, Windward Islands, West Indies, Caribbean, Central America
Unconformity of older Jurassic sediments and Pliocene limestone plus later lava on top at Caleta Negra, Ajuy, Fuerteventura, Spain, Atlantic, Europe
Roque Bentayga at sunset, Gran Canaria, Canary Islands, Spain, Atlantic Ocean, Europe
Volcanic rock formations at Sarakiniko on north coast, Sarakiniko, Milos, Cyclades, Aegean Sea, Greek Islands, Greece, Europe
Surf and natural arch on Playa La Pared on the volcanic island of Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Los Roques de Garcia at Caldera de las Canadas, Pico de Teide at sunset, National Park Teide, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Europe
View south over Charco de Guelde bay from the cliff tops at this northwest village, El Cotillo, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Sunset from the volcanic crater of Pico del Teide, Teide National Park, Tenerife, Canary Islands, Spain, Europe
A view of the volcanic crater and colourful crater lake on Santa Ana Volcano in Santa Ana, El Salvador, Central America
Road through Caldera de las Canadas, Pico del Teide, National Park Teide, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Europe
A view of the volcanic crater on Santa Ana Volcano in Santa Ana, El Salvador, Central America
Lava field in Sullivan Bay, Santiago (James) Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America
Poas Volcano, Poas National Park, Costa Rica
Panoramic image of Fira in the evening with cruiser and volcanic landscape, Santorini, Cyclades, Greek Islands, Greece, Europe
Lava coast near Los Hervideros, Montanas del Fuego, Parque Natinal de Timanfaya, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Europe
Waterfall in Lava Canyon, Mount St. Helens National Volcanic Monument, Washington State, United States of America, North America
Waves crashing on cliffs at Ajuy volcanic beach, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Male Tenerife lizard (Western Canaries lizard) (Gallotia galloti) sun basking on volcanic rock, raising a back foot to cool it, Tenerife, Canary Islands, Spain, Europe
Aerial of the volcanic south coast, Taveuni, Fiji, South Pacific, Pacific
Waterfall in Lava Canyon, Mount St. Helens National Volcanic Monument, Washington State, United States of America, North America
Blow hole on the volcanic south coast of Taveuni, Fiji, South Pacific, Pacific
Rincon de la Vieja National Park at foot of Rincon Volcano, Gaunacaste, Costa Rica
Poas Volcano, Poas National Park, Costa Rica
Sunset over Roque Bentayga, Gran Canaria, Canary Islands, Spain, Atlantic Ocean, Europe
A view of the volcanic crater and colourful crater lake on Santa Ana Volcano in Santa Ana, El Salvador, Central America
Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Europe
Volcanic landscape, Hawaii Volcanoes National Park, UNESCO World Heritage Site, Big Island, Hawaii, United States of America, North America
Ubehebe Crater, a volcanic crater half a mile across and 600 feet deep, Death Valley National Park, California, United States of America, North America
Walkway through cold lava in the Craters of the Moon National Park, Idaho, United States of America, North America
Sunset over Roque Bentayga, Gran Canaria, Canary Islands, Spain, Atlantic Ocean, Europe
Roque Bentayga, Gran Canaria, Canary Islands, Spain, Atlantic Ocean, Europe
Playa del Puerto Beach, Puerto de Tazacorte, La Palma, Canary Islands, Spain, Europe
Cold lava walls in the Craters of the Moon National Park, Idaho, United States of America, North America
Tejeda with Roque Nublo in the background, Gran Canaria, Canary Islands, Spain, Atlantic Ocean, Europe
Teno Mountains at sunset, Tenerife, Canary Islands, Spain, Europe
Evening view over Fira and the volcanic landscape, Santorini, Cyclades, Greek Islands, Greece, Europe
Freshwater stream carving through soft volcanic rocks to reach the sea, Trebarwith Strand, Cornwall, England, United Kingdom, Europe
View of road and volcanic coastline from Mirador del Rio at sunset, Lanzarote, Las Palmas, Canary Islands, Spain, Atlantic, Europe
Fishing village El Golfo at sunset, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Playa de las Teresitas Beach, San Andres, Tenerife, Canary Islands, Spain, Europe
Walkway through cold lava in the Craters of the Moon National Park, Idaho, United States of America, North America
Walkway through cold lava in the Craters of the Moon National Park, Idaho, United States of America, North America
Walkway through cold lava in the Craters of the Moon National Park, Idaho, United States of America, North America
Pico de Teide at sunset, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Europe
Panoramic view from hot air balloon of Cappadocian landscape and hot air balloons, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Colourful volcanic rocks of the Andes mountains, along Bolivia-Chile border range, Southwest Highlands, Bolivia, South America
Waterfall beneath Mount Mayon, 2462m, a volcanic cone with plume of smoke, Bicol Province, southeast Luzon, Philippines, Southeast Asia, Asia
Hot air balloon taking off with tourists on board for a flight over the famous volcanic tufa rock formations around Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Eurasia
Petroglyph National Monument, petroglyphs carved into volcanic rock by American Indians 400 to 700 years ago, New Mexico, 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 Ocean.
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
Christie's Hole, eroded volcanic rock coast of Papa Stour (Great Island of the Priests), Shetland Islands, Scotland, United Kingdom, Europe
Part of the vast crater of 10023 ft Haleakala, the world's largest dormant volcano, seen from Sliding Sands trail, Maui, Hawaii, Hawaiian Islands, United States of America (U.S.A.), North America
Volcanic rock formations on south eastern coast, Kleftiko, Milos, Cyclades islands, Greece, Mediterranean, Europe
Irregular blocky lava (a'a) and cinder cones of the volcanic landscape of Timanfaya National Park, Lanzarote, Canary Islands, Spain, Atlantic Ocean, Europe
Cueva de Los Verdes, cave tourist attraction in lava pipe tunnel, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Petroglyph National Monument, petroglyphs carved into volcanic rock by American Indians 400 to 700 years ago, New Mexico, United States of America, North America
Volcanic cone over the vineyards of Lanzarote, Canary Islands, Spain, Atlantic, Europe
Eshaness basalt cliffs, Calder's Geo, ancient volcanic crater, coast deeply eroded with caves, blowholes and stacks, Northmavine, Shetland Islands, Scotland, United Kingdom, Europe
Petroglyph National Monument, petroglyphs carved into volcanic rock by American Indians 400 to 700 years ago, New Mexico, United States of America, North America
Petroglyph National Monument, petroglyphs carved into volcanic rock by American Indians 400 to 700 years ago, New Mexico, United States of America, North America
Moss covered lava beds surround Snaefellsjokull, an active strato volcano capped in snow and ice, on the Snaefellsnes Peninsula, North West area, Iceland, Polar Regions
Volcanic rocks and sea, Parque Nacional de Timanfaya, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Volcanic stratified rocks, Parque Nacional del Teide, Tenerife, Canary Islands, Spain, Europe
Hot air balloon flight over the famous volcanic tufa rock formations around Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Eurasia
Lava beds surround Snaefellsjokull, an active strato volcano capped in snow and ice, on the Snaefellsnes Peninsula, North West area, Iceland, Polar Regions
Colourful volcanic landscape, Tupiza, Southern Altiplano, Bolivia, South America
Erosion with volcanic tuff pillars, Pasabagi, near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Oia village and volcanic rocks, Santorini (Thira), Cyclades islands, Greece, Mediterranean, Europe
Volcanic rocks and beach at Paleokori, southern coast, Milos, Cyclades islands, Greece, Mediterranean, Europe
Yellow and orange volcanic rock, Nisyros (Nisiros) (Nissyros), Dodecanese islands, Greece, Mediterranean, Europe
Erosion with volcanic tuff pillars. Pasabagi, near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Erosion with volcanic tuff pillars, Pasabagi near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Rock formations on the volcanic coastline on the island of Graciosa in the Azores, Portugal, Atlantic, Europe
Volcanic rock formations on south eastern coast, near Kleftiko, Milos, Cyclades islands, Greece, Mediterranean, Europe
Volcanic coastline, island of Sao Jorge, Azores, Portugal, Atlantic, Europe
Active summit craters, Mount Etna, UNESCO World Heritage Site, Catania, Sicily, Italy, Europe
Erosion with volcanic tuff pillars near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Lava field, Iceland
Colourful volcanic rock, Mount Tarawera, Rotorua, South Auckland, North Island, New Zealand, Pacific
Erosion with volcanic tuff pillars, near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Volcanic tuff pillars and erosion, Pasabagi, Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Erosion with volcanic tuff pillars near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Erosion with volcanic tuff pillars, Pasabagi near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Mount Etna, Sicily, Italy, Europe
Active summit craters, Mount Etna, UNESCO World Heritage Site, Catania, Sicily, Italy, Europe
Volcanic rock on the waterfront, Arrecife, Lanzarote Island, Canary Islands, Spain, Europe
Erosion with volcanic tuff pillars near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Mount Etna, Sicily, Italy, Europe
Mount Etna, Sicily, Italy, Europe
East Wailua Falls cuts back through volcanic rock on the lush slopes inland from Wailua on the east coast of Kauai, the 'Garden Island', Kauai, Hawaii, USA
Looking south towards Lake Helen from dormant 10,457ft Lassen Peak, the world's largest plug-dome volcano, in Lassen Volcanic National Park, an area of volcanic activities and features, Lassen Volcanic Park, Northern California, California, United States of America (USA), North America