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Adult bull Steller sea lions (Eumetopias jubatus), territorial display at the Solomon Gulch Hatchery, Valdez, Alaska, United States of America, North America

Adult bull Roosevelt elks (Cervus canadensis roosevelti), in rut near Highway 101, California, United States of America, North America

View of the Deadhorse Creek Trail, Mount Rainier National Park, Washington State, United States of America, North America

Waterfall in Lava Canyon, Mount St. Helens National Volcanic Monument, Washington State, United States of America, North America

Meltwater lake on Mount Rainier from the Burroughs Mountain Trail, Mount Rainier National Park, Washington State, United States of America, North America

Crystal clear waters and pebbled beaches, Mackinac Island, Michigan, United States of America, North America

Joshua tree (Yucca brevifolia), at night in Joshua Tree National Park, Mojave Desert, California, United States of America, North America

Joshua tree (Yucca brevifolia), at night in Joshua Tree National Park, Mojave Desert, California, United States of America, North America

Hikers in Havasu Creek, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Marble Canyon along the Colorado River, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View of the North Rim of Grand Canyon National Park from Bright Angel Point, UNESCO World Heritage Site, Arizona, United States of America, North America

View of the Colorado River from the Glen Canyon Dam Bridge on Highway 89, Arizona, United States of America, North America

Adult female sea otter (Enhydra lutris), hauled out on ice in Glacier Bay National Park, Southeast Alaska, United States of America, North America

Rafters on the Colorado River through the Grand Canyon, Arizona, United States of America, North America

Silhouette of a man tumbling down a sand dune in Nags Head, North Carolina, United States of America, North America

A farmer preparing to feed his flock of free range chickens at Rockland Farm near Seneca, Maryland, United States of America, North America

Great white egret (Ardea alba) looking for food, Sanibel Island, J.N. Ding Darling National Wildlife Refuge, Florida, United States of America, North America

Tufa formations at Mono Lake, South Tufa State Reserve, Sierra Nevada, California, United States of America, North America

View of Lipan Point on the right from Pinal Point at Grand Canyon, with The Desert View Watchtower in the distance, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

The Majestic Apartments Building on Central Park West, above Central Park Lake and Bow Bridge, Manhattan, New York, United States of America, North America

El Capitan and the Yosemite Valley from the Merced River at Valley View, Yosmeite National Park, UNESCO World Heritage Site, California, United States of America, North America

Adult humpback whale (Megaptera novaeangliae) breaching in Monterey Bay National Marine Sanctuary, California, United States of America, North America

Commercial rafters run the Lava Falls Rapid, just before river mile 180, Grand Canyon National Park, Arizona, United States of America, North America

An adult female bighorn sheep (Ovis canadensis nelsoni), with two lambs in Grand Canyon National Park, Arizona, United States of America, North America

Adult female killer whale, Orcinus orca, breaching in Behm Canal, Southeast Alaska, United States of America.

Ancient Hogans used in Navajo ceremonies, in Navajo National Monument, Navajo Indian Reservation northwest of the town of Kayenta, Arizona, United States of America, North America

The Horse Collar Ruins located between the Sipapu Arch Bridge and the Kachina Arch Bridge, Natural Bridges National Monument, Utah, United States of America, North America

A pod of transient killer whales (Orcinus orca), feeding on a gray whale calf carcass in Monterey Bay Marine Sanctuary, California, United States of America, North America

A pod of transient killer whales (Orcinus orca), feeding on a gray whale calf carcass in Monterey Bay Marine Sanctuary, California, United States of America, North America

Transient killer whales (Orcinus orca), surfacing in Monterey Bay Marine Sanctuary, Monterey, California, United States of America, North America

Adult western gull (Larus occidentalis), in flight in Monterey Bay Marine Sanctuary, Monterey, California, United States of America, North America

A flowering blind pricklypear cactus (Opuntia rufida), Big Bend National Park, Texas, United States of America, North America

Round-tailed ground squirrel (Xerospermophilus tereticaudus), Brandi Fenton Park, Tucson, Arizona, United States of America, North America

Round-tailed ground squirrel (Xerospermophilus tereticaudus), Brandi Fenton Park, Tucson, Arizona, United States of America, North America

Red rock formations known as hoodoos in Bryce Canyon National Park, Utah, United States of America, North America

Mirror Lake in the Tenaya Canyon, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

A rock island with a little rock window on its top called the Tea Pot Arch at Ferry Swale in the Glen Canyon Recreation Area near Page, Arizona, United States of America, North America

Rippling sandstone badlands near the Spur Canyon at Horseshoe Bend, Arizona, United States of America, North America

The pathway into a spur canyon just north of the main overlook of Horseshoe Bend, Arizona, United States of America, North America

View from the Abyss Overlook just after sunset, Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America

View from the cliffs of Powell Point behind the Powell Memorial, Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America

View from below the cliffs of Powell Point, Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America

The Powell Memorial in the distance viewed from Hopi Point, Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America

Hopi Point in the distance viewed from the rim trail near Mohave Point, Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America

Look back at the Great Mohave Wall Overlook from a rock platform just below the cliffs at Grand Canyon, Arizona, United States of America, North America

A rock platform below the cliffs of the Great Mohave Wall Overlook at Grand Canyon, Arizona, United States of America, North America

Steps down to Mather Point Overlook at Grand Canyon in winter after sunset, Grand Canyon, Arizona, United States of America, North America

The Greenway Trail that runs between Pima Point and Monument Creek Vista, Grand Canyon, Arizona, United States of America, North America

Grand Canyon viewed from Pima Point at sundown, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Tufted puffin (Fratercula cirrhata), St. George Island, Pribilof Islands, Alaska, United States of America, North America

Elephant Rock, Natural Rock Formation, Valley of Fire State Park, Nevada, United States of America, North America

Sunset over the ocean and two palm trees in silhouettte, Dana Point, California, United States of America, North America

Mother humpback whale (Megaptera novaeangliae) breaching near her calf in Icy Strait, southeast Alaska, United States of America, North America

Teton mountains looking towards Schwabacher's Landing, Grand Teton National Park, Wyoming, United States of America (U.S.A.), North America

Various hoodoos in Angels Garden at Petrified Forest National Park, Arizona, United States of America, North America

City skyline and Cumberland river at dusk, Riverfront Park, Nashville, Tennessee, United States of America, North America

Dunes at dawn, White Sands National Park, New Mexico, United States of America (U.S.A.), North America

Young humpback whale (Megaptera novaeangliae), breaching near Lincoln Island, Southeast Alaska, United States of America, North America

An adult North American beaver (Castor canadensis) along the shore in Grand Teton National Park, Wyoming, United States of America, North America

Young humpback whale (Megaptera novaeangliae), breaching at sunset in Peril Strait, Southeast Alaska, United States of America, North America

Adult humpback whale (Megaptera novaeangliae), flukes-up dive near Morris Reef, Southeast Alaska, United States of America, North America

Sandstone formations at first light, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Sandstone formation with clouds, Valley of Fire State Park, Nevada, United States of America, North America

Red sandstone with three-dimensional erosion forms, Gold Butte, Nevada, United States of America, North America

Midway Geyser Basin thermal activity from the Fairy Creek Trail, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Steam from Imperial and Spray Geysers through regenerating forest, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Surf, rocks, and sea stacks at dawn, Ecola State Park, Oregon, United States of America, North America

Rock and pine trees lit by early morning sun in winter, Queen's Garden Connecting Trail, Bryce Canyon National Park, Utah, United States of America, North America

Rocks and lone pine tree lit by dawn light in winter, Queen's Garden Trail, Sunrise Point, Bryce Canyon National Park, Utah, United States of America, North America

Kilauea Lighthouse, Kilauea Point, National Wildlife Refuge, Island of Kauai, Hawaii, United States of America, Pacific, North America

View of Waipio Valley, Island of Hawaii (Big Island), Hawaii, United States of America, Pacific, North America

September 11 memorials at New York City firehouse, New York, United States of America, North America

Red rock formations, Red Canyon, Dixie National Forest, Utah, United States of America, North America

Volcanic landscape, Hawaii Volcanoes National Park, UNESCO World Heritage Site, Big Island, Hawaii, United States of America, North America

Obelisk of the Washington Monument at the Mall, Washington, District of Columbia, United States of America, North America

Mountain stream through Palmeto Gulch with golden aster (Chrysopsis villosa), Gunnison National Forest, Colorado, United States of America, North America

Mesa Arch at sunrise, Canyonlands National Park, Island In The Sky District, Utah, United States of America, North America