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African forest elephant (Loxodonta cyclotis), Dzanga Bai, Dzanga Sangha National Park, UNESCO, Central African Republic

African forest elephant (Loxodonta cyclotis), Dzanga Bai, Dzanga Sangha National Park, UNESCO, Central African Republic

African forest elephant (Loxodonta cyclotis), Dzanga Bai, Dzanga Sangha National Park, UNESCO, Central African Republic

African forest elephant (Loxodonta cyclotis), Dzanga Bai, Dzanga Sangha National Park, UNESCO, Central African Republic

African forest elephant (Loxodonta cyclotis), Dzanga Bai, Dzanga Sangha National Park, UNESCO, Central African Republic

African forest elephant (Loxodonta cyclotis), Dzanga Bai, Dzanga Sangha National Park, UNESCO, Central African Republic

Sawyer Glacier calving from Tracy Arm-Fords Terror Wilderness area in Southeast Alaska, United States of America

Scenic view from Tracy Arm-Fords Terror Wilderness area in Southeast Alaska, United States of America

Scenic view from Tracy Arm-Fords Terror Wilderness area in Southeast Alaska, United States of America

Adult brown bears (Ursus arctos) feeding on humpback whale carcass, Scidmore Cut, Glacier Bay National Park, Alaska, United States of America

Harbor seal (Phoca vitulina) hauled out on submerged log in Misty Fjords National Monument, Southeast Alaska, United States of America

Riding the bus along the 92 mile-long road into Denali National Park, Alaska, United States of America

View of the Polychrome Mountains from lookout point on the park road inside Denali National Park and Preserve, Alaska, United States of America

Young brown bear (Ursus arctos) scratching its back on the gravel at the Brooks River, Katmai National Park, Alaska, United States of America

Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America

Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America

Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America

Adult brown bears (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America

Adult brown bears (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America

A beautiful waterfall just outside the small Norwegian summer area in Sandvika Bay on the south side of Svesfjord, Norway

A beautiful waterfall just outside the small Norwegian summer area in Sandvika Bay on the south side of Svesfjord, Norway

Maasai man standing on the top of a rock looking at the landscape, in the area around Namanga, Kenya, East Africa

Maasai man standing on the top of a rock looking at the landscape, in the area around Namanga, Kenya, East Africa

View of the lake created by the historic Bainbridge Steel Dam near Ash Fork, Kaibab National Forest, Arizona, United States of America

Perched hamlet in Ounila River valley between Anmiter and Tighza, Ouarzazate Province, region of Draa-Tafilalet, Morocco

Bike rider off the road from Telouet to Ait Ben Haddou, Ounila River valley, Ouarzazate Province, region of Draa-Tafilalet, Morocco

Basalt boulders and cliffs, Johnson Canyon east of Bainbridge Steel Dam Lake near Ash Fork, Kaibab National Forest, Arizona, United States of America

Basalt formation in Johnson Canyon east of the Bainbridge Steel Dam Lake near Ash Fork, Kaibab National Forest, Arizona, United States of America

Basalt boulders and cliffs, Johnson Canyon east of Bainbridge Steel Dam Lake near Ash Fork, Kaibab National Forest, Arizona, United States of America

Dry waterfall cliffs, Johnson Canyon between Bainbridge Steel and Stone Dams near Ash Fork, Kaibab National Forest, Arizona, United States of America

Man climbs down massive orange sand dune, dead tree in foreground, in Sossusvlei area, Namib Desert, Namib-Naukluft, Namibia, Africa

Southwestern view from a cliff in the saddle area of Cathedral Rock, Sedona, Arizona, United States of America, North America

Fall colours around Lower Cramer Lake, Sawtooth Mountains, Sawtooth Wilderness, Sawtooth National Recreation Area, Rocky Mountains, Idaho, United States of America, North America

Dawn over Baron Lake, Sawtooth Mountains, Sawtooth Wilderness, Sawtooth National Recreation Area, Rocky Mountains, Idaho, United States of America, North America

Dawn over Baron Lake, Sawtooth Mountains, Sawtooth Wilderness, Sawtooth National Recreation Area, Rocky Mountains, Idaho, United States of America, North America

Sawtooth Mountains, Sawtooth Wilderness, Sawtooth National Recreation Area, Rocky Mountains, Idaho, United States of America, North America

Waterfall, Louse River, Boundary Waters Canoe Area Wilderness, Superior National Forest, Minnesota, United States of America, North America

Hiking in the Sawtooth Mountains, Sawtooth Wilderness, Sawtooth National Recreation Area, Rocky Mountains, Idaho, United States of America, North America

Dawn over Baron Lake, Sawtooth Mountains, Sawtooth Wilderness, Sawtooth National Recreation Area, Rocky Mountains, Idaho, United States of America, North America

Rapids between Mora Lake and Little Saganaga Lake, Boundary Waters Canoe Area Wilderness, Superior National Forest, Minnesota, United States of America, North America

Baron Lake, Sawtooth Mountains, Sawtooth Wilderness, Sawtooth National Recreation Area, Rocky Mountains, Idaho, United States of America, North America

Bear Hang, food bag hung between two trees to protect it from bears, Boundary Waters Canoe Area Wilderness, Superior National Forest, Minnesota, United States of America, North America

Hiking through lunar landscape up to Cramer Divide, Sawtooth Mountains, Sawtooth Wilderness, Sawtooth National Recreation Area, Rocky Mountains, Idaho, United States of America, North America

Sawtooth Mountains, Sawtooth Wilderness, Sawtooth National Recreation Area, Rocky Mountains, Idaho, United States of America, North America

Misty morning, Malberg Lake, Boundary Waters Canoe Area Wilderness, Superior National Forest, Minnesota, United States of America, North America

Camp on Malberg Lake, Boundary Waters Canoe Area Wilderness, Superior National Forest, Minnesota, United States of America, North America

Baron Lake, Sawtooth Mountains, Sawtooth Wilderness, Sawtooth National Recreation Area, Rocky Mountains, Idaho, United States of America, North America

Water lilies on the Frost River, Boundary Waters Canoe Area Wilderness, Superior National Forest, Minnesota, United States of America, North America

The Washakie Wilderness area within Shoshone National Forest, Wyoming, United States of America, North America

Ben Mor Coigach in winter, Assynt, Assynt-Coigach National Scenic Area, Sutherland, Scottish Highlands, Scotland, United Kingdom, Europe

Fast-growing staghorn coral fragments, Acropora sp., are being grown in hopes of replanting colonies in reef areas of the Caribbean Sea that have been damaged.

Symbiotic anemones cover the shell of a hermit crab, Dardanus pedunculatus, 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.

Scenic views of the south Sawyer Glacier in Tracy Arm-Fords Terror Wilderness area in Southeast Alaska, United States of America, North America

Hiking path traversing rock plains and rocky mountain top pass area of Colle del Turlo, Vercelli, Piedmont, Italian Alps, Italy, Europe

Wangjiang Pavilion from afar in Lushan (Mount Lu), Jiujiang City, Jiangxi, China. Lushan is a UNESCO World Heritage site, it is one of China's most famous mountains known for its natural beauty.

The Forest Service Road that leads to the summit of O'Leary Peak in the Coconino National Forest of Arizona.

Aerial view taken by drone of desert area near Capitol Reef National Park on a summer day, Hanksville, Utah, United States of America

Drone aerial view of Kriaritsi project area with abandoned roads in the south of Greece, Sithonia, Chalkidiki, Greece

Drone aerial view of Kriaritsi project area with abandoned roads in the south of Greece, Sithonia, Chalkidiki, Greece

Breathtaking view of forested mountains with autumn colors and distant hills, viewed from Mount Hiei (Hiei San), Kyoto area, Honshu, Japan

Coconino National Forest from the southwest summit of Apache Maid Mountain, Coconino National Forest, Arizona, United States of America

The Salt River Canyon, hazy view as smoke in the air from wildfire in the area, north of Globe, Arizona, United States of America, North America

Hiking in the Baron Creek valley, Sawtooth Mountains, Sawtooth Wilderness, Sawtooth National Recreation Area, Rocky Mountains, Idaho, United States of America, North America

First light on Beinn an Eoin and Sgorr Tuath in winter above the Drumrunie Road, Assynt, Assynt-Coigach National Scenic Area, Sutherland, Scottish Highlands, Scotland, United Kingdom, Europe

Scenic views of the south Sawyer Glacier in Tracy Arm-Fords Terror Wilderness Area in Southeast Alaska, United States of America, North America

Sunset over Malberg Lake, Boundary Waters Canoe Area Wilderness, Superior National Forest, Minnesota, United States of America, North America

Dawn over Baron Lake, Sawtooth Mountains, Sawtooth Wilderness, Sawtooth National Recreation Area, Rocky Mountains, Idaho, United States of America, North America

A tube anemone grows on a sandy seafloor in Komodo National Park, Indonesia. This tropical area in the western Pacific harbors an extraordinary array of marine organisms.

Garden coral, sponges, and other invertebrates grow in a shallow seagrass meadow 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.

Details of the sand dunes at Mesquite Flat, Death Valley, California, United States of America, North America

Ancient wall of the Fort Silver Indian Ruins overlooking Silver Creek Canyon in Agua Fria National Monument of Arizona

The fire watchtower on the summit of O'Leary Peak in the Coconino National Forest of Arizona. Adjacent to the Sunset Crater National Monument.

Forest Service Road that leads to the O'Leary Peak Watchtower and Overlook. Adjacent to Sunset Crater National Monument Arizona in the Coconino National Forest.

View of snow covered Aosta Valley and mountains from Pavillon du Mont Frety in winter, Courmayeur, Aosta Valley, Italian Alps, Italy

Adult brown bear (Ursus arctos) shaking water from its fur near whale carcass in Glacier Bay National Park, Alaska, United States of America

Calluna vulgaris flowers.Nordmannvikdalen valley, region of Lyngen, County of Troms, Norway, Northern Europe

Sawtooth Mountains, Sawtooth Wilderness, Sawtooth National Recreation Area, Rocky Mountains, Idaho, United States of America, North America

A beautiful coral reef thrives 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.

Views of the area just outside of Stanley, the capital and only true city, with a cathedral, in the Falkland Islands, South America

Visitors climb massive orange sand dune known as Dune 45, Sossusvlei area, Namib Desert, Namib-Naukluft, Namibia, Africa

Misty morning, Malberg Lake, Boundary Waters Canoe Area Wilderness, Superior National Forest, Minnesota, United States of America, North America

Brunnich's guillemot (Uria lomvia) breeding and nesting site at Cape Fanshawe in the Svalbard Archipelago, Norway, Arctic, Europe

Admiring the view, Sawtooth Mountains, Sawtooth Wilderness, Sawtooth National Recreation Area, Rocky Mountains, Idaho, United States of America, North America

The Washakie Wilderness area within Shoshone National Forest, Wyoming, United States of America, North America