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Bryce Canyon National Park, Utah, United States of America, North America
The Chimney, Capitol Reef National Park, Utah, United States of America, North America
Taughannock Falls, Taughannock Falls State Park, Ithaca, New York State, 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
Arches National Park, Moab, Utah, United States of America, North America
Bryce Canyon National Park, Utah, United States of America, North America
Hoodoos and cliffs with snow lit by late afternoon sun, from Rim Trail near Sunset Point, Bryce Canyon National Park, Utah, United States of America, North America
The Pinnacles limestone formations at sunset in Nambung National Park, Western Australia, Australia, Pacific
Zion National Park, Utah, United States of America, North America
Zion National Park, Utah, United States of America, North America
Bryce Canyon National Park, Utah, United States of America, North America
Delicate Arch, Arches National Park, Moab, Utah, United States of America, North America
Bryce Canyon National Park, Utah, United States of America, North America
Park Avenue, Arches National Park, Moab, Utah, United States of America, North America
Remarkable Rocks, Flinders Chase National Park, Kangaroo Island, South Australia, Australia, Pacific
Hikers on trail, High Tatras Mountains (Vyoske Tatry), Tatra National Park, Slovakia, Europe
Old millstones left at quarried edge of gritstone (millstone grit), Stanage Edge, Peak District National Park, Derbyshire, England, United Kingdom, Europe
Carlsbad Caverns, Carlsbad Caverns National Park, UNESCO World Heritage Site, New Mexico, United States of America, North America
The Perito Moreno Glacier, rare in that it is advancing rather than retreating, Los Glaciares National Park, UNESCO World Heritage Site, Patagonia, Argentina, South America
The Perito Moreno Glacier, rare in that it is advancing rather than retreating, Los Glaciares National Park, UNESCO World Heritage Site, Patagonia, Argentina, South America
The Perito Moreno Glacier, rare in that it is advancing rather than retreating, Los Glaciares National Park, UNESCO World Heritage Site, Patagonia, Argentina, South America
Sand dune and tree near Sesriem, Namib Naukluft park, Namibia, Africa
Rocks along the coastline in the Acadia National Park, Maine, New England, United States of America, North America
The Morning Glory Pool, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Roadside building dwarfed by the Athabasca Glacier in the Jasper National Park, UNESCO World Heritage Site, Alberta, Canada, North America
Ayers Rock, Uluru-Kata Tjuta National Park, UNESCO World Heritage Site, Northern Territory, Australia, Pacific
The Morning Glory Pool, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Late winter hikers on Tongariro crossing, Mount Ngauruhoe and South Crater, Taupo, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific
Pinnacles and rock formations known as The Silent City, seen from Inspiration Point, with snow on the ground, in the Bryce Canyon National Park, Utah, United States of America, North America
Pinnacles and rock formations caused by erosion and known as The Silent City, seen from Inspiration Point, in the Bryce Canyon National Park, Utah, United States of America, North America
Rock formations caused by erosion, and a solitary pine tree above the Queens Garden, in the Bryce Canyon National Park, in Utah, United States of America, North America
Yellow school bus, for students on geology field trip, Waterton Glacier International Peace Park, Rocky Mountains, Montana, United States of America, North America
Tiny figures show scale of the Deer cave looking back to mouth of the Deer cave, Mulu National Park, Sarawak, island of Borneo, Malaysia, Southeast Asia, Asia
Spectacular limestone outcrops and forested valleys of Zhangjiajie Forest Park in Wulingyuan Scenic Area in Hunan Province, UNESCO World Heritage Site, China, Asia
Llamas grazing before Volcanoes Parinacota and Pomerape, Lauca National Park, Chile, South America
Garibaldi Glacier, Darwin National Park, Tierra del Fuego, Patagonia, Chile, South America
View from limestone pavement across the Jamison Valley in the Blue Mountains National Park where the blue haze is caused by eucalyptus oil, near Katoomba, UNESCO World Heritage Site, New South Wales (N.S.W.), Australia, Pacific
Looking out through entrance of cave, Deer Cave, Gunung Mulu National Park, UNESCO World Heritage Site, Sarawak, island of Borneo, Malaysia, Southeast Asia, Asia
Remarkable Rocks, Flinders Chase National Park, Kangaroo Island, South Australia, Australia, Pacific
Part of Nourlangie Rock, sacred aboriginal shelter and rock art site, Kakadu National Park, UNESCO World Heritage Site, Northern Territory, Australia, Pacific
Part of the North Unit of Badlands National Park, carved out of the prairies by rapid water erosion of sediments, South Dakota, United States of America, North America
Svartifoss waterfall, Skaftafell National Park, Iceland, Polar Regions
People canoeing near Tham Law (tube cove), Ao Phang-Nga Marine Park, Phang Nga province, Thailand, Southeast Asia, Asia
Aerial view of the sandy dunes and lagoons, part of Parque Nacional dos Lencois Maranhenses, Brazil, South America
Aerial view of the sandy dunes and lagoons, part of Parque Nacional dos Lencois Maranhenses, Brazil, South America
Mount Fuji (3776m), Owakidani geothermal park, Hakone, Honshu Island, Japan, Asia
One of the crater lakes at Band-E-Amir (Dam of the King), Afghanistan's first National Park set up in 1973 to protect the five lakes, believed by locals to have been created by the Prophet Mohammed's son-in-law Ali, making them a place of pilgrimage, Afghanistan, Asia
Band-i-Zulfiqar, the main lake at Band-E-Amir (Dam of the King), Afghanistan's first National Park set up in 1973 to protect the five lakes, believed by locals to have been created by the Prophet Mohammed's son-in-law Ali, making them a place of pilgrimage, Afghanistan, Asia
Band-i-Zulfiqar, the main lake at Band-E-Amir (Dam of the King), Afghanistan's first National Park set up in 1973 to protect the five lakes, believed by locals to have been created by the Prophet Mohammed's son-in-law Ali, making them a place of pilgrimage, Afghanistan, Asia
Band-i-Zulfiqar, the main lake at Band-E-Amir (Dam of the King), Afghanistan's first National Park set up in 1973 to protect the five lakes, believed by locals to have been created by the Prophet Mohammed's son-in-law Ali, making them a place of pilgrimage, Afghanistan, Asia
Band-i-Zulfiqar, the main lake at Band-E-Amir (Dam of the King), Afghanistan's first National Park set up in 1973 to protect the five lakes, believed by locals to have been created by the Prophet Mohammed's son-in-law Ali, making them a place of pilgrimage, Afghanistan, Asia
Aerial view of the Iguassu Falls, Iguassu National Park, UNESCO World Heritage Site, Parana, Brazil, South America
Band-I-Zulfiqar the main lake, Band-E- Amir (Bandi-Amir) (Dam of the King) crater lakes, Afghanistan's first National Park, Bamian province, Afghanistan, Asia
Tourists inspecting the large halite salt crystal formations, Devils Golf Course, Death Valley National Park, California, United States of America, North America
Plumes of steam where the lava reaches the sea, Kilauea Volcano, Hawaii Volcanoes National Park, UNESCO World Heritage Site, Island of Hawaii (Big Island), Hawaii, United States of America, Pacific, North America
Limestone pavements near Chapel-le-Dale, Yorkshire Dales, National Park, Yorkshire, England, United Kingdom, Europe
Limestone pavements near Chapel-le-Dale, Yorkshire Dales, National Park, Yorkshire, England, United Kingdom, Europe
Buttertubs potholes, karstic erosion at Buttertubs Pass, between Wensleydale and Swaledale, Yorkshire Dales National Park, Yorkshire, England, United Kingdom, Europe
Buttertubs potholes, karstic erosion at Buttertubs Pass, between Wensleydale and Swaledale, Yorkshire Dales National Park, Yorkshire, England, United Kingdom, Europe
Norber erratics near Austwick, erratic boulders left on limestone pavement by erosion, Yorkshire Dales National Park, Yorkshire, England, United Kingdom, Europe
Red sand dunes, up to 300m, Sossusvlei, Namib-Naukluft Desert Park, Namibia, Africa
Limestone pavements near Chapel-le-Dale, Yorkshire Dales National Park, Yorkshire, England, United Kingdom, Europe
Hiking trail and rocky peaks on Cradle Mountain on the Overland Track, Cradle Mountain Lake St. Clair National Park, part of Tasmanian Wilderness, UNESCO World Heritage Site, Tasmania, Australia, Pacific
Hikers near Emerald Lakes on the Tongariro Crossing, Tongariro National Park, UNESCO World Heritage Site, the oldest national park in New Zealand, Taupo Volcanic Zone, North Island, New Zealand, Pacific
Water cascading off Rob Roy Glacier, Mount Aspiring National Park, Otago, South Island, New Zealand, Pacific
Early morning light on corrugated badlands landscape at Zabriskie Point, Death Valley National Park, California, United States of America, North America
Malham Cove, Malham, Yorkshire Dales National Park, North Yorkshire, England, United Kingdom, Europe
Scree slope and limestone vale, near Conistone, Yorkshire Dales National Park, North Yorkshire, England, United Kingdom, Europe
Limestone pavement at Lea Green, Grassington, Yorkshire Dales National Park, North Yorkshire, England, United Kingdom, Europe
Uluru (Ayers Rock), Uluru-Kata Tjuta National Park, UNESCO World Heritage Site, with the Olgas in the distance, Northern Territory, Australia, Pacific
Ayers Rock, Uluru-Kata Tjuta National Park, UNESCO World Heritage Site, Northern Territory, Australia, Pacific
The Pinnacles, Nambung National Park, Cervantes, Western Australia, Australia, Pacific
Remarkable Rocks, Flinders Chase National Park, Kangaroo Island, South Australia, Australia, Pacific
Remarkable Rocks, Flinders Chase National Park, Kangaroo Island, South Australia, Australia, Pacific
Sand patterns in water, dark volcanic sand lying just below white sand, Manuel Antonio National Park, Quepos, Costa Rica, Central America
Gordale Scar, Yorkshire Dales National Park, North Yorkshire, England, United Kingdom, Europe
Limestone pavement, Malham, Yorkshire Dales National Park, North Yorkshire, Yorkshire, England, United Kingdom, Europe
Carlsbad Caverns, Carlsbad Caverns National Park, UNESCO World Heritage Site, New Mexico, United States of America, North America
The Remarkable Rocks, weathered layer remnants on a granite dome, Flinders Chase National Park, Kangaroo Island, South Australia, Australia, Pacific
Thrombolites, a variey of microbialite or living rock that produce oxygen and deposit calcium carbonate, similar to some of the earliest fossil forms of life found on Earth, Lake Clifton, Yalgorup National Park, Mandurah, Western Australia, Australia, Pacific
Thrombolites, a variey of microbialite or living rock that produce oxygen and deposit calcium carbonate, similar to some of the earliest fossil forms of life found on Earth, Lake Clifton, Yalgorup National Park, Mandurah, Western Australia, Australia, Pacific
Tourist walks round Masaya crater, Santiago crater, Park National Volcan Masaya, Masaya, Nicaragua, Central America
Thrombolites, a variey of microbialite or living rock that produce oxygen and deposit calcium carbonate, similar to some of the earliest fossil forms of life found on Earth, Lake Clifton, Yalgorup National Park, Mandurah, Western Australia, Australia, Pacific
Rock pillars formed by erosion of thick hard layer of calcrete over soft limestone, The Pinnacles Desert, Nambung National Park, near Cervantes, Dandaragan Shire, Western Australia, Australia, Pacific
Rock pillars formed by erosion of thick hard layer of calcrete over soft limestone, The Pinnacles Desert, Nambung National Park, near Cervantes, Dandaragan Shire, Western Australia, Australia, Pacific
A general view of the Athabasca Glacier, a six kilometre tongue of ice flowing from the Columbia Icefield. It is the best-known glacier in the Canadian Rockies and is situated in Jasper National Park, Alberta, Canada.
Irregular blocky lava (a'a) and cinder cones of the volcanic landscape of Timanfaya National Park, Lanzarote, Canary Islands, Spain, Atlantic Ocean, Europe
Hikers taking a rest above the Skaftafellsjokull glacier, Skaftafellsa glacial river in the background, in Skaftafell National Park, south-east Iceland (Austurland), Iceland, Polar Regions
Huliba limestone caves, Arikok National Park, Aruba (Dutch Antilles), West Indies, Caribbean, Central America
Hound Tor, Dartmoor National Park, Devon, England, United Kingdom, Europe
Uluru (Ayers Rock), Uluru-Kata Tjuta National Park, UNESCO World Heritage Site, Northern Territory, Australia, Pacific
Uluru (Ayers Rock), Uluru-Kata Tjuta National Park, UNESCO World Heritage Site, Northern Territory, Australia, Pacific
The Olgas (Kata Tjuta) at sunrise, Uluru-Kata Tjuta National Park, UNESCO World Heritage Site, Northern Territory, Australia, Pacific
Views from the Nadab lookout, at the sacred Aboriginal site of Ubirr, Kakadu National Park, UNESCO World Heritage Site, Northern Territory, Australia, Pacific
Uluru (Ayers Rock), Uluru-Kata Tjuta National Park, UNESCO World Heritage Site, Northern Territory, Australia, Pacific
Yaga River and karst limestone cliffs of Escuain gorge, Ordesa and Monte Perdido National Park, Huesca, Aragon, Spain, Europe
Castle Geyser, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Lava flow, Kilauea, Hawaii Volcanoes National Park, UNESCO World Heritage Site, Island of Hawaii (Big Island), Hawaii, United States of America, North America
Cooled lava from recent eruption, Kilauea Volcano, Hawaii Volcanoes National Park, UNESCO World Heritage Site, Island of Hawaii (Big Island), Hawaii, United States of America, North America
Red sand dunes, up to 300m, Sossusvlei, Namib-Naukluft Desert Park, Namibia, Africa