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Giant's Causeway, County Antrim, Northern Ireland, UK, Europe
Giant's Causeway, County Antrim, Northern Ireland, UK, Europe
Couple resting on bench, viewing the lake at Grasmere, Lake District, Cumbria, England, UK
To Sua ocean trench in Upolu, Samoa, South Pacific, Pacific
Perito Moreno Glacier at dawn, Los Glaciares National Park, UNESCO World Heritage Site, Patagonia, Argentina, South America
Tourist boat floating through the Puerto Princesa underground river, the New Wonder of the World, Puerto-Princesa Subterranean River National Park, UNESCO World Heritage Site, Palawan, Philippines, Southeast Asia, Asia
Tourist boat floating through the Puerto Princesa underground river, the New Wonder of the World, Puerto-Princesa Subterranean River National Park, UNESCO World Heritage Site, Palawan, Philippines, Southeast Asia, Asia
Tourists on boardwalk in silhouette, Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Hooker Lake and Glacier with icebergs and Mount Cook, Mount Cook National Park, UNESCO World Heritage Site, Canterbury region, South Island, New Zealand, Pacific
Tour guide hiking on the ice of Fox Glacier, Westland Tai Poutini National Park, South Island, New Zealand, Pacific
Woman walking steps out of a ice cave in Fox Glacier, Westland Tai Poutini National Park, South Island, New Zealand, Pacific
Woman standing in an ice cave, Fox Glacier, Westland Tai Poutini National Park, South Island, New Zealand, Pacific
Hiker on a horse trail in winter with hoodoos and rocks glowing in early morning light, Bryce Canyon National Park, Utah, United States of America, North America
Hiker in front of Wall of Windows lit by early morning sun, icy Peekaboo Loop Trail, Bryce Canyon National Park, Utah, United States of America, North America
Hiker takes a break on the Peekaboo Loop Trail in winter, with snowy red rocks and cliffs, Bryce Canyon National Park, Utah, United States of America, North America
Hikers from the cablecar near the smoking summit of 3350m volcano Mount Etna during an active phase, Mount Etna, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe
Glaciar Perito Moreno (Perito Moreno Glacier), Lago Argentino, Los Glaciares National Park, UNESCO World Heritage Site, Patagonia, Argentina, South America
Female tourist on boardwalk by the Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Seltun, Krysuvik geothermal area, Reykjanes Peninsula, Iceland, Polar Regions
Visitor at Painted Wall View Point, Gunnison River deep in the canyon, Black Canyon of the Gunnison National Park, Colorado, United States of America, North America
Tourists waiting to watch the full moon rise over the Valle de la Luna (Valley of the Moon), Atacama Desert, Norte Grande, Chile, South America
Young woman enjoying the coast, Second Beach, Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America, North America
Rock formations against a clear blue sky with mountains in the background, showcasing natural erosion and geological features in the Teide National Park,UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic, Europe
Raufarholsheillir lava tube cave system, Iceland, Polar Regions
Japanese warning sign on the crater rim of Mount Naka active volcano, Mount Aso, Kyushu, Japan, Asia
Alcantara gorge, Castiglione di Sicilia, Sicily, Italy, Mediterranean, Europe
Crateri Silvestri view, Etna, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Volcanic landscape, Valle del Bove, Etna, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Volcanic landscape, Valle del Bove, Etna, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Crateri Silvestri, high angle view, Etna, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Crateri Silvestri view, Etna, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Group of hikers walking up to Mount Etna summit, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Group of hikers walking up to Mount Etna summit, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe
Rock formations, Alcantara gorge, Castiglione di Sicilia, Sicily, Italy, Mediterranean, Europe
Puu Hinahina Lookout, Waimea Canyon State Park, Kauai, Hawaii, United States of America, Pacific
Cenote Dzitnup, near Valladolid, Yucatan, Mexico, North America
Cenote Samula, near Valladolid, Yucatan, Mexico, North America
Cenote Ik Kil, near Chichen Itza, Yucatan, Mexico, North America
Historic ancient salt pans on coast near Marsalforn, island of Gozo, Malta, Mediterranean, Europe
Berlenga Grande Island, Portugal, Europe
The chalk cliffs of the Seven Sisters from the South Downs Way, South Downs National Park, East Sussex, England, United Kingdom, Europe
The Nant Ffrancon valley in spring backed by Foel Goch and the Glyderau mountains, Snowdonia National Park (Eryri), North Wales, United Kingdom, Europe
Splashes of sulphur colouring Stefanos crater ground, Nisyros Island, Dodecanese Islands, Greek Islands, Greece, Europe
Barragem do Alqueva, Rio Guadiana river, Alqueva dam hydroelectric power, Moura, Portugal, Europe
Laguna Colorada, a shallow red salt lake in South West Bolivia, South America
Laguna Cejar (floating salt lake lagoon), Atacama Desert, North Chile, Chile, South America
Jebel al Fil (Elephant Rock), sandstone, Al Ula, North West Saudi Arabia, Middle East
Salinas Grandes, Jujuy Province, Argentina, South America
Glow worms in Waitomo Caves, Waikato Region, North Island, New Zealand, Pacific
Al Gharameel, sandstone towers, near Al Ula, North West Saudi Arabia, Middle East
Wadi Disah (Wadi Qaraqir), sandstone canyon near Tabuk, North West Saudi Arabia, Middle East
Wadi Disah (Wadi Qaraqir), sandstone canyon near Tabuk, North West Saudi Arabia, Middle East
Suspension bridge over terrace farmland in Huangling, Wuyuan County, Shangrao City, Jiangxi Province, China
View of valley and lakes, Lady's View, Killarney, County Kerry, Munster, Republic of Ireland
Cliffs of Coumeenoole Beach at sunset, Dingle Peninsula, County Kerry, Munster, Republic of Ireland
Scala dei Turchi, Agrigento, Sicily, Italy
Scala dei Turchi, Agrigento, Sicily, Italy
Riserva Naturale di Punta Bianca, Palma di Montechiaro, Agrigento, Sicily, Italy
Riserva Naturale di Punta Bianca, Palma di Montechiaro, Agrigento, Sicily, Italy
Riserva Naturale di Punta Bianca, Palma di Montechiaro, Agrigento, Sicily, Italy
Riserva Naturale di Punta Bianca, Palma di Montechiaro, Agrigento, Sicily, Italy
Riserva Naturale di Punta Bianca, Palma di Montechiaro, Agrigento, Sicily, Italy
Scala dei Turchi, Agrigento, Sicily, Italy
Scala dei Turchi, Agrigento, Sicily, Italy
Scala dei Turchi, Agrigento, Sicily, Italy
Cave of Poetry (Grotta della Poesia), Roca Vecchia, Lecce, Salento, Apulia, Italy
Cave of Poetry (Grotta della Poesia), Roca Vecchia, Lecce, Salento, Apulia, Italy
Cave of Poetry (Grotta della Poesia), Roca Vecchia, Lecce, Salento, Apulia, Italy
Cave of Poetry (Grotta della Poesia), Roca Vecchia, Lecce, Salento, Apulia, Italy
Tsingy de Bemaraha Strict Nature Reserve, UNESCO World Heritage Site, near the western coast in Melaky Region, Madagascar, Africa
Bera Bach from Bera Mawr, Carneddau Mountains, Snowdonia National Park (Eryri), North Wales, United Kingdom
Two people walking along the beach towards the spectacular rocks along the Cote de Granit Rose (Pink Granite Coast) at Ploumanach, Cotes d'Armor, Brittany, France, Europe
A tourist inside the sea caves of Benagil admires the clear waters of the Atlantic Ocean, Faro District, Algarve, Portugal, Europe
Postojna Cave, near Postojna, southwestern Slovenia, Europe
Postojna Cave, near Postojna, southwestern Slovenia, Europe
Postojna Cave, near Postojna, southwestern Slovenia, Europe
Hidden valley ski area, Armentarola 101, Lagazuoi, Dolomites, UNESCO World Heritage Site, Dolomites, South Tyrol, Italy, Europe
Cacti on Isla de los Pescadores, Volcan Tunupa and the salt flats, Salar de Uyuni, Southwest Highlands, Bolivia, South America
Rock formation in the Eduardo Avaroa Andean Fauna National Reserve, Southwest Highlands, Bolivia, South America
Wahban Crater (caldera) in Hejaz Mountains northeast of Jeddah, Saudi Arabia, Middle East
Rainbow Arch, in sandstone, north of Al Ula, North West Saudi Arabia, Middle East
Sandstone brain rock and red and white swirls at dawn, White Pocket, Vermilion Cliffs National Monument, Arizona, United States of America, North America
Sandstone wave and cones under clouds, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America
Tree on sandstone silhouetted at sunset with purple clouds, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America
Orange clouds at sunset over sandstone cones, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America
Secret Falls in the fall, Washington County, Utah, United States of America, North America
Brain Rock at dusk, White Pocket, Vermilion Cliffs National Monument, Arizona, United States of America, North America
Juniper and sandstone cones under the stars, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America
Stack Rocks, Castlemartin, Pembrokeshire, Wales, United Kingdom, Europe
Church Rock, Broad Haven Beach, Pembrokeshire, West Wales, Wales, United Kingdom, Europe
Salinas Grandes, Jujuy, Argentina, South America
Valle de los Hongos (Mushroom Rocks) formed of volcanic ash, Creel, Chihuahua, Mexico, North America
Giant's Causeway, UNESCO World Heritage Site, Bushmills, County Antrim, on the north coast of Northern Ireland, Ulster, Northern Ireland, United Kingdom, Europe
Devils Bridge, Sedona, Arizona, United States of America, North America
Footpath at Rio Pinturas Canyon, Cave of the Hands, UNESCO World Heritage Site, Patagonia, Province of Santa Cruz, Argentina, South America
Woman looking at a Geysirfield in the Te Puia Maori Cultural Center, Rotorura, North Island, New Zealand, Pacific
Paliochori beach, Milos Island, Cyclades Islands, Greek Islands, Greece, Europe
View of Rocca di Cerere rock formation, Enna, Sicily, Italy, Mediterranean, Europe
View of the Hermitage of Santa Maria di Montevergine, Caltabellotta, Agrigento district, Sicily, Italy, Mediterranean, Europe
View of lava fields and snow-capped peaks in the distance, Etna, Sicily, Italy, Mediterranean, Europe