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The 7th switchback along the North Kaibab Trail at Grand Canyon North Rim, UNESCO, Arizona, United States of America

Excursion with zodiac around the Pia Glacier, Cordillera Darwin, Northeast branch of the Beagle Channel, Tierra del Fuego, Patagonia, Chile, South America

A view of the west side of Angel de la Guarda Island, Baja California, Sea of Cortez, Mexico, North America

Trail leading through valley to Rainbow Mountain, Uchullujllo, Pitumarca District, Canchis Province, Cuzco Region, Peru, South America

Examples of Tafoni created in the Warton Sandstone layer, King George River, Kimberley, Western Australia, Australia, Pacific

An adult eastern osprey (Pandion haliaetus cristatus), in flight over Montgomery Reef, Kimberley, Western Australia, Australia, Pacific

Villa at The Thousand Nights Camp in the Sharqiya Sands, formerly Wahiba Sands, desert region, Sultanate of Oman, Arabian Peninsula

Dry stone walls, Inishmore, largest of the Aran Islands, Galway Bay, County Galway, Connacht, Republic of Ireland

Sunset over the hills behind Granada and wide landscapes with the snowy Sierra Nevada behind, Granada, Andalusia, Spain

Road through the sandstone rock formations in the desert canyons of the Ashar Valley, Medina Province, Saudi Arabia

Ice flower sculpted by wind at Stokla pass (4900m), Hemis National Park, Ladakh region, state of Jammu and Kashmir, India, Asia

Remarkable sandstone rock carved by erosion in the Ashar Valley, AlUla, Medina Province, Saudi Arabia

Museum in the Chauvet-Pont-d'Arc Cave, UNESCO World Heritage Site, Ardeche, Auvergne-Rhone-Alpes, France, Europe

Caldera de Taburiente National Park, UNESCO Biosphere Site, La Palma, Canary Islands, Spain, Atlantic, Europe

Continental drift between North American and Eurasian tectonic plates, Thingvellir National Park, UNESCO, in winter, Western Region, Iceland

View over the fjords Steinfjorden and Ersfjorden from Husfjellet mountain.Senja island.County of Troms, Norway, Northern Europe

Girl admiring the landscape, Dead Horse Point State Park, Moab, Utah, United States of America, North America

Lone hiker walks into the tundra leading to Mount Denali (Mount McKinley), Alaska, United States of America, North America

Misty Mount William, glaciers and icebergs, sunny weather, Anvers Island, from Bismarck Strait, Antarctic Peninsula, Antarctica, Polar Regions

Pinnacle rocks, glaciers, mountains of Greenwich Island, from the sea, bright, misty weather, South Shetland Islands, Antarctica, Polar Regions

Palanderbukta, Icecap and pack ice, Gustav Adolf Land, Nordaustlandet, Svalbard archipelago, Arctic, Norway, Europe

View of Lee Mountain, Courthouse Butte, and Castle Rock, from the secret trail on the east side of Cathedral Rock in Sedona, Arizona, United States of America, North America

Morning sunlight and mist, Reflection Lake, Mount Rainier National Park, Washington State, United States of America, North America

East slopes of Haystack Mesa in Petrified Forest National Park, Arizona, United States of America, North America

Local woman standing on a rock in beautiful mountain scenery along the road from Massawa to Asmara, Eritrea, Africa

View from Mount Ossa, 1617m, Tasmania's highest mountain on the Overland Track, Cradle Mountain Lake St. Clair National Park, part of Tasmanian Wilderness, UNESCO World Heritage Site, Tasmania, Australia, Pacific

Ruins of the farmyard adjoining the Clifden Castle, ruined manor house near Clifden, Connemara, County Galway, Connacht, Republic of Ireland

Loch an Eilein, near Aviemore, Cairngorms National Park, Highlands, Scotland, United Kingdom, Europe

Close up of stupa (chorten) on a mountain slope in front of glaciers, Kyanjin Gompa, Langtang Valley trek, Himalayas, Nepal, Asia

A thorny seahorse (Hippocampus histrix) uses effective camouflage to blend into its surroundings on the seafloor of Lembeh Strait, Indonesia.

Blue starfish (Linckia laevigata) cling to a coral bommie in Indonesia. This species of seastar is common throughout the Indo-Pacific.

Delicate corals grow on a shallow reef near the island of Flores in Indonesia. This beautiful region is known for its spectacular reefs and high marine biodiversity.

Corals grow on a shallow reef in Indonesia. This beautiful, tropical region is known for its spectacular reefs and high marine biodiversity.

A bulbed anemone (Entacmaea quadricolor) grows on a reef in Komodo National Park, Indonesia. This beautiful area harbors extraordinary marine biodiversity and is a popular destination for divers and snorkelers.

A pair of robust ghost pipefish (Solenostomus cyanopterus) hover above the seafloor in Komodo National Park, Indonesia. This tropical area in the western Pacific harbors an extraordinary array of marine organisms.

A snowflake moray eel (Echidna nebulosa) pokes its head out of a hole in Komodo National Park, Indonesia. This beautiful area harbors extraordinary marine biodiversity and is a popular destination for divers and snorkelers.

A flathead fish camouflages itself in the sandy seafloor of Komodo National Park, Indonesia. This tropical region in Indonesia is known for its spectacular coral reefs and high marine biodiversity.

A lionfish (Pterois volitans) displays its venomous spines in Komodo National Park, Indonesia. This tropical area in the western Pacific harbors an extraordinary array of marine organisms.

A colorful crinoid clings to a coral reef slope in Komodo National Park, Indonesia. This tropical region in Indonesia is known for its spectacular coral reefs and high marine biodiversity.

A stargazer fish (Uranoscopus sulphureus) camouflages itself in sand in Komodo National Park, Indonesia. This tropical region in Indonesia is known for its spectacular coral reefs and high marine biodiversity.

A spine-cheeked anemonefish (Premnas biaculeatus) swims among the tentacles of its host anemone in Wakatobi National Park, Indonesia.

A massive school of bigeye trevally (Caranx sexfasciatus) swims in deep water near Cocos Island, Costa Rica. This remote island is home to an incredible variety of marine life.

Colorful lily pads grow along the shallow edge of a freshwater lake in New England. Aquatic vegetation, which thrives during summer months, provides vital habitat for many fish, amphibians, and reptiles.

Detail of a colonial tunicate growing on a reef in Raja Ampat, Indonesia. This remote, tropical region is home to extraordinary marine biodiversity.

A colorful West Indian starfish, Oreaster reticulatus, crawls over a shallow, sandy seafloor in Turneffe Atoll in the Caribbean Sea. This reef is part of the massive Mesoamerican Reef System, the second largest barrier reef on Earth.

A beautiful nudibranch, Bornella anguilla, crawls over black sand in Komodo National Park, Indonesia. This rare nudibranch can swim over short distances quite well.

A beautiful bouquet of tunicates and cnidarians grows on a reef in Komodo National Park, Indonesia. This tropical area in the Lesser Sunda Islands is known for both its amazing marine biodiversity as well its infamous dragons.

A brightly colored soft coral adorns prop roots in a blue water mangrove forest in Raja Ampat, Indonesia.

A colorful flamboyant cuttlefish, Metasepia pfefferi, crawls across the sandy seafloor in Lembeh Strait, Indonesia.

A broadclub cuttlefish, Sepia latimanus, hovers over a healthy reef on the remote island of Teun in Indonesia's Banda Sea.

A beautiful coral reef thrives in shallow water in Indonesia's Banda Sea. This part of eastern Indonesia is home to part of the world's greatest marine biodiversity.

Adult female Magellan goose (upland goose) (Chloephaga picta), on New Island in the Falkland Islands, South Atlantic Ocean, South America

Sunrise on king penguins (Aptenodytes patagonicus) at nesting and breeding colony at Salisbury Plain, South Georgia, Polar Regions

Adult Antarctic fur seal (Arctocephalus gazella), on lichen-covered rocks in Hercules Bay on South Georgia Island, Polar Regions