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Northern pintail (Anas acuta) drake, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Sandstone formation under clouds, Coyote Buttes Wilderness, Vermillion Cliffs National Monument, Arizona, United States of America, North America

Ridges in sandstone under clouds, Coyote Buttes Wilderness, Vermillion Cliffs National Monument, Arizona, United States of America, North America

Layered sandstone column under clouds, Coyote Buttes Wilderness, Vermillion Cliffs National Monument, Arizona, United States of America, North America

Person walking on red sandstone cliff on Cap-aux-Meules Island in the Iles de la Madeleine (Magdalen Islands), Quebec, Canada, North America

Rock Art, Anthropomorph images, 600AD to 1250AD, Sego Canyon, Southern Utah, United States of America, North America

Grizzly bear (Ursus arctos horribilis) sow and two cubs of the year all standing up on their hind legs, Yellowstone National Park, Wyoming, United States of America, North America

San Francisco de Asis Mission Church, National Historic Landmark, established 1772, Ranchos de Taos, New Mexico, United States of America, North America

Space Needle from Seattle's International Fountain park in autumn, Seattle, Washington State, United States of America, North America

Seattle city skyline at night with urban office buildings and Space Needle viewed from garden near Kerry Park, Seattle, Washington State, United States of America, North America

Seattle skyline on sunny day from Bell Harbor Marina, Seattle, Washington State, United States of America, North America

Aerial view of hot air balloon floating over farmland and Mount Rainier in the distance, Washington State, United States of America, North America

A cleaner shrimp (Lysmata amboinensis), inspects the teeth of an undulated moray eel, Hawaii, United States of America, Pacific, North America

A young Commerson's frogfish (Antennarius commerson), just three inches long, Hawaii, United States of America, Pacific, North America

The shell of Hawaiian reef lobster (Enoplometopus occidentalis), covered in algae and parasitic barnacles, Hawaii, United States of America, Pacific, North America

A great barracuda (Sphyraena barracuda) comes close to the reef to be cleaned by a cleaner wrasse, Hawaii, United States of America, Pacific, North America

A longjaw squirrelfish (Sargocentron spiniferum), and a school of bigscale soldierfish (Myripristis berndti), Hawaii, United States of America, Pacific, North America

A pod of spinner dolphins (Stenella longirostris) in Hawaii, United States of America, Pacific, North America

An Atlantic bottlenose dolphin (Tursiops truncatus) head above water, United States of America, Pacific, North America

Seven spinner dolphin (Stenella longirostris) leaps into the air at the same time, Hawaii, United States of America, Pacific, North America

Spinner dolphins (Stenella longirostris) leap into the air at the same time, Hawaii, United States of America, Pacific, North America

A spinner dolphin (Stenella longirostris) leaps into the air, Hawaii, United States of America, Pacific, North America

Atlantic bottlenose dolphins (Tursiops truncatus), feeding on small fish, United States of America, North America

Close-up of a devil scorpionfish (Scorpaenopsis diabolus), Hawaii, United States of America, Pacific, North America

Haleakala Crater, in Haleakala National Park, Maui's dormant volcano, Hawaii, United States of America, Pacific, North America

Endangered Florida manatee (Trichechus manatus latirostris), at Three Sisters Spring in Crystal River, Florida, United States of America, North America

A group of goose barnacles (Lepas anatifera) attached to a buoy off the Big Island of Hawaii, United States of America, Pacific, North America

Endangered Florida manatee (Trichechus manatus latirostris), at Three Sisters Spring in Crystal River, Florida, United States of America, North America

Green sea turtle getting its shell cleaned by goldring surgeonfish off Maui, Hawaii, United States of America, Pacific, North America

The spotted porcupinefish (Diodon hystrix), Hawaii, United States of America, Pacific, North America

The Kona crab (Ranina ranina) (Spanner crab), Maui, Hawaii, United States of America, Pacific, North America

A garibaldi (Hypsypops rubicundus) in a forest of giant kelp off Catalina Island, California, United States of America, North America

The graceful decorator crab (Oregonia gracilis), attaches organisms to its back, British Columbia, Canada, North America

Petrified Forest National Park, Blue Mesa, Blue Mesa Trail, sedimentary layers of bluish bentonite clay

Petrified logs from the late Triassic period, 225 million years ago, Long Logs Trail, Petrified Forest National Park, Arizona, United States of America, North America

Sedimentary layers of bluish bentonite clay with petrified wood, Blue Mesa Trail, Blue Mesa, Petrified Forest National Park, Arizona, United States of America, North America

Sedimentary layers of bluish bentonite clay, The Tepees, Petrified Forest National Park, Arizona, United States of America, North America

Petrified logs from the late Triassic period, 225 million years ago, Long Logs Trail, Petrified Forest National Park, Arizona, United States of America, North America

Petrified logs from the late Triassic period, 225 million years ago, Long Logs Trail, Petrified Forest National Park, Arizona, United States of America, North America

Petrified logs from the late Triassic period, 225 million years ago, Long Logs Trail, Petrified Forest National Park, Arizona, United States of America, North America

Petrified logs from the late Triassic period, 225 million years ago, Long Logs Trail, Petrified Forest National Park, Arizona, United States of America, North America

Agate Bridge, a petrified log spanning ravine, Petrified Forest National Park, Arizona, United States of America, North America

Sedimentary layers of bluish bentonite clay, Blue Mesa Trail, Blue Mesa, Petrified Forest National Park, Arizona, United States of America, North America

San Xavier del Bac Mission, founded in 1692, National Historic Landmark, Tohono O'odham San Xavier Indian Reservation, Arizona, United States of America, North America

San Jose de Tumacacori Mission, established in 1691, Tumacacori National Historic Park, New Mexico, United States of America, North America

Flowers of the Jumping Cholla cactus (Hanging Chain Cholla) (Cylindropuntia Fulgida), West-Tucson Mountain District, Saguaro National Park, Arizona, United States of America, North America

Flower of the prickly pear cactus (Opuntia), West-Tucson Mountain District, Saguaro National Park, Arizona, United States of America, North America

Petroglyphs, created by the prehistoric Hohokam people, about 1000 years ago, West-Tucson Mountain District, Saguaro National Park, Arizona, United States of America, North America

San Xavier del Bac Mission, founded in 1692, National Historic Landmark, Tohono O'odham San Xavier Indian Reservation, Arizona, United States of America, North America

Teddy Bear Cholla cactus (Cylindropuntia Bigelovil), West-Tucson Mountain District, Saguaro National Park, Arizona, United States of America, North America

Cracks in eroded badlands, Badlands National Park, South Dakota, United States of America, North America

Casa Grande (Great House) Ruins National Monument, home to the Sonora Desert people, founded near 400 AD, abandoned about 1450 AD, Coolidge, Arizona, United States of America, North America

Cliff dwelling of Southern Sinagua farmers, built in the early 1100s CE (Common Era), a five storey, 20 room structure, Montezuma Castle National Monument, Arizona, United States of America, North America

Cliff dwelling of Southern Sinagua farmers, built in the early 1100s CE (Common Era), a five storey, 20 room structure, Montezuma Castle National Monument, Arizona, United States of America, North America

Casa Grande (Great House) Ruins National Monument, home to the Sonora Desert people, founded near 400 AD, abandoned about 1450 AD, Coolidge, Arizona, United States of America, North America

Quarai Mission, building began around 1628, Salinas Pueblo Missions National Monument, New Mexico, United States of America, North America

Empty Sky memorial to New Jerseyans lost during 911 attacks on the World Trade Center, Liberty State Park, Jersey City, New Jersey, United States of America, North America

World Trade Center, Freedom Tower (One World Trade Center), Downtown, Manhattan, New York, United States of America, North America

Laura Grier at sunrise at The Badlands, Black Hills, South Dakota, United States of America, North America

Buffalo Round Up, Custer State Park, Black Hills, South Dakota, United States of America, North America

Lomaki Pueblo, inhabited from approximately 1100 AD to 1250 AD, Wupatki National Monument, Arizona, United States of America, North America

Lesser snow geese (Chen caerulescens caerulescens) in flight at sunrise, greater sandhill cranes (Grus canadensis tabida) in water, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

A procession of musicians in Room 1, Temple of Murals, Bonampak Archaeological Zone, Chiapas, Mexico, North America

Greater sandhill cranes (Grus canadensis tabida) gray in color, and lesser snow geese (Chen caerulescens caerulescens) white in color, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Greater sandhill cranes (Grus canadensis tabida) at sunrise, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Prisoner of the victorious Mayan ruler, Room 2, Temple of Murals, Bonampak Archaeological Zone, Chiapas, Mexico, North America

Lesser snow geese (Chen caerulescens caerulescens), Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Arco-Torre del Carmen built in 1677, and statue of Mariano Ruiz Suasnavar in the foreground, San Cristobal de las Casas, Chiapas, Mexico, North America

Temple of St. Nicolas, built between 1613 and 1621, San Cristobal de las Casas, Chiapas, Mexico, North America

Facade of the Santo Domingo Church, originally built during the late 16th century, Chiapa de Corzo, Chiapas, Mexico, North America

Temple of St. Nicolas, built between 1613 and 1621, San Cristobal de las Casas, Chiapas, Mexico, North America

A series of tall crosses at the crest of the graveyard, boards represent doors to and from the grave, village of El Romerillo, Chiapas, Mexico, North America

A series of tall crosses at the crest of the graveyard, boards represent doors to and from the grave, village of El Romerillo, Chiapas, Mexico, North America

Greater sandhill cranes (Grus canadensis tabida) gray in color, and lesser snow geese (Chen caerulescens caerulescens) white in color, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Greater sandhill cranes (Grus canadensis tabida) grey color, and lesser snow geese (Chen caerulescens caerulescens) white color, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Greater sandhill crane (Grus canadensis tabida), Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Lesser snow geese (Chen caerulescens caerulescens) in flight, and greater sandhill cranes (Grus canadensis tabida) standing in water, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Greater sandhill cranes (Grus canadensis tabida) in foreground, and lesser snow geese (Chen caerulescens caerulescens) in background, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America