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

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

Rocky Coastline by the Atlantic Ocean, Dr. Bill Freedman Nature Preserve, Nature Conservancy of Canada, Nova Scotia, Canada, North America

Full moon on saguaro cactus (Carnegiea gigantea), Sweetwater Preserve, Tucson, Arizona, United States of America, North America

Sunrise on saguaro cactus in bloom (Carnegiea gigantea), Sweetwater Preserve, Tucson, Arizona, United States of America, North America

Stranded ice on the low tide in front of Lamplugh Glacier, Glacier Bay National Park and Preserve, Alaska, United States of America, North America

Perito Moreno Glacier, UNESCO World Heritage Site, around El Calafate, Santa Cruz province, Patagonia, Argentina, South America

A view of Tlingit eagle carving at Bartlett Cove in Glacier Bay National Park and Preserve, UNESCO World Heritage Site, Southeast Alaska, United States of America, North America

Scenic view of Glacier Bay National Park and Preserve, UNESCO World Heritage Site, Southeast Alaska, Pacific Ocean, United States of America, North America

Nurse shark (Ginglymostoma cirratum), with boat in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

Nurse sharks (Ginglymostoma cirratum), massing in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

Nurse shark (Ginglymostoma cirratum), on the sand in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

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

Flowering prickly pear cactus (Opuntia ficus-indica), in the Sweetwater Preserve, Tucson, Arizona, United States of America, North America

Scenic view of Glacier Bay National Park and Preserve, UNESCO World Heritage Site, Southeast Alaska, Pacific Ocean, United States of America, North America

Looking down into the Los Peces fresh water cave near Playa Giron, Matanzas Province, Cuba, West Indies, Caribbean, Central America

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

The Little Teepees on the north side of Haystack Mesa in Petrified Forest National Park, Arizona, United States of America, North America

Crystal Mesa above Crystal Creek west of Hamilili Point in Petrified Forest National Park, Arizona, United States of America, North America

View of Aqueduct from the Ottoman era and Kavala Fortress, Dimos Kavalas, Eastern Macedonia and Thrace, Gulf of Thasos, Gulf of Kavala, Thracian Sea, Greece, Europe

Male Gambel's Quail (Callipepla gambelii), Henderson Bird Viewing Preserve, Henderson, Nevada, United States of America, North America

Grizzly bear (Ursus arctos horribilis) (Coastal brown bear), Katmai National Park and Preserve, Alaska, United States of America, North America

Nurse shark (Ginglymostoma cirratum), with boat in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

Beaver (Castor canadensis) hauling a log up over its dam, Denali National Park and Preserve, Alaska, United States of America

Beaver (Castor canadensis) swimming, Denali National Park and Preserve, Alaska, United States of America, North America

Grizzly bear (Ursus arctos horribilis) (Coastal brown bear) eating a salmon, Katmai National Park and Preserve, Alaska, United States of America, North America

Giant saguaro cactus (Carnegiea gigantea) at dawn in the Sweetwater Preserve, Tucson, Arizona, United States of America, North America

The super full moon rising over saguaro cactus (Carnegiea gigantea), Sweetwater Preserve, Tucson, Arizona, United States of America, North America

A close up view of Lamplugh Glacier in Glacier Bay National Park and Preserve, UNESCO World Heritage Site, Southeast Alaska, United States of America, North America

A view in Glacier Bay National Park and Preserve, UNESCO World Heritage Site, Southeast Alaska, United States of America, North America

State Historical and Memorial Preserve The Battle of Stalingrad, Volgograd, Volgograd Oblast, Russia, Eurasia

Wild Iris flowers on the rocky coastline by the Atlantic Ocean, Dr. Bill Freedman Nature Preserve, Nature Conservancy of Canada, Nova Scotia, Canada, North America

Grizzly bear (brown bear) (Ursus arctos) at Crescent Lake, Lake Clark National Park and Preserve, Alaska, United States of America, North America

Grizzly (brown) bear (Ursus arctos) at Crescent Lake, Lake Clark National Park and Preserve, Alaska, United States of America, North America

Stranded ice on the low tide in front of Lamplugh Glacier, Glacier Bay National Park and Preserve, Alaska, United States of America, North America

Male lesser goldfinch (Carduelis psaltria), Patagonia-Sonoita Creek Preserve, Patagonia, Arizona, United States of America, North America

Beaver (Castor canadensis) swimming with food, Denali National Park and Preserve, Alaska, United States of America, North America

Mount Foraker in the fall, Denali National Park and Preserve, Alaska, United States of America, North America

An island of rock just off the Billings Gap Trail at Petrified Forest National Park, Arizona, United States of America, North America

Rocky Coastline by the Atlantic Ocean, Dr. Bill Freedman Nature Preserve, Nature Conservancy of Canada, Nova Scotia, Canada, North America

Giant saguaro cactus (Carnegiea gigantea) at night in the Sweetwater Preserve, Tucson, Arizona, United States of America, North America

Sunrise on saguaro cactus in bloom (Carnegiea gigantea), Sweetwater Preserve, Tucson, Arizona, United States of America, North America

Mount Redoubt and Crescent Lake, Lake Clark National Park and Preserve, Alaska, United States of America, North America

Louisiana heron (Hydranassa tricolor), Big Cypress Nature Preserve, Florida, United States of America, North America

An adult stork-billed kingfisher (Pelargopsis capensis), perched in Tangkoko National Preserve on Sulawesi Island, Indonesia, Southeast Asia, Asia

Rocky Coastline by the Atlantic Ocean, Dr. Bill Freedman Nature Preserve, Nature Conservancy of Canada, Nova Scotia, Canada, North America

The super full moon rising over saguaro cactus (Carnegiea gigantea), Sweetwater Preserve, Tucson, Arizona, United States of America, North America

An adult brown bear (Ursus arctos) fishing for salmon at Brooks Falls, Katmai National Park and Preserve, Alaska, United States of America, North America

A view of Johns Hopkins Glacier against the Fairweather Range in Glacier Bay National Park and Preserve, UNESCO World Heritage Site, Alaska, United States of America, North America

A view of Margerie Glacier against the Fairweather Range in Glacier Bay National Park and Preserve, UNESCO World Heritage Site, Alaska, United States of America, North America

A view of Tarr Inlet in Glacier Bay National Park and Preserve, UNESCO World Heritage Site, Southeast Alaska, United States of America, North America

Mojave National Preserve, Granite Mountains in background, California, United States of America, North America

Giant saguaro cactus (Carnegiea gigantea), at dawn in the Sweetwater Preserve, Tucson, Arizona, United States of America, North America

Adult brown bears (Ursus arctos) fishing for salmon at Brooks Falls, Katmai National Park and Preserve, Alaska, United States of America, North America

A tub full of green sea turtle hatchlings (Chelonia mydas), Tangkoko National Preserve on Sulawesi Island, Indonesia, Southeast Asia, Asia

Mount McKinley in the fall, Denali National Park and Preserve, Alaska, United States of America, North America

Sunrise on saguaro cactus in bloom (Carnegiea gigantea), Sweetwater Preserve, Tucson, Arizona, United States of America, North America

An adult brown bear (Ursus arctos) fishing for salmon at Brooks Falls, Katmai National Park and Preserve, Alaska, United States of America, North America

Sunset in Glacier Bay National Park and Preserve, Southeast Alaska, United States of America, North America

Meadow near Williams known as Sunflower Flat Wildlife Preserve, normally a wetland now dry due to Arizona's drought, Arizona, United States of America, North America

Beaver (Castor canadensis) swimming, Denali National Park and Preserve, Alaska, United States of America, North America

Red squirrel (spruce squirrel) (Tamiasciurus hudsonicus) in a spruce tree, Denali National Park and Preserve, Alaska, United States of America, North America

Dwarf Dogwood flowers and the rocky coastline by the Atlantic Ocean, Dr. Bill Freedman Nature Preserve, Nature Conservancy of Canada, Nova Scotia, Canada, North America

Rocky Coastline by the Atlantic Ocean, Dr. Bill Freedman Nature Preserve, Nature Conservancy of Canada, Nova Scotia, Canada, North America

The Cliff Palace Indian dwelling, Mesa Verde National Park, UNESCO World Heritage Site, Colorado, United States of America, North America

Rainbow over South Marble Island in Glacier Bay National Park and Preserve, Southeast Alaska, United States of America, North America

A mother brown bear (Ursus arctos) with her cubs on the beach in Lake Clark National Park and Preserve, Alaska, United States of America, North America

The super full moon rising over saguaro cactus (Carnegiea gigantea), Sweetwater Preserve, Tucson, Arizona, United States of America, North America

Grizzly bear (Ursus arctos horribilis) (Coastal brown bear) sow and spring cub walking along a stream, Katmai National Park and Preserve, Alaska, United States of America, North America

Grizzly (brown) bear (Ursus arctos) at Crescent Lake, Lake Clark National Park and Preserve, Alaska, United States of America, North America

A pointed peak of bentonite in Hamilili Valley on the south end of Petrified Forest National Park, Arizona, United States of America, North America

Grizzly bear (Ursus arctos horribilis) (Coastal brown bear) cub, Katmai National Park and Preserve, Alaska, United States of America, North America

Rocky Coastline by the Atlantic Ocean, Dr. Bill Freedman Nature Preserve, Nature Conservancy of Canada, Nova Scotia, Canada, North America

Rocky Coastline by the Atlantic Ocean, Dr. Bill Freedman Nature Preserve, Nature Conservancy of Canada, Nova Scotia, Canada, North America

The Cliff Palace Indian dwelling, Mesa Verde National Park, UNESCO World Heritage Site, Colorado, United States of America, North America

The super full moon rising over saguaro cactus (Carnegiea gigantea), Sweetwater Preserve, Tucson, Arizona, United States of America, North America

A tub full of green sea turtle hatchlings (Chelonia mydas), Tangkoko National Preserve on Sulawesi Island, Indonesia, Southeast Asia, Asia

Black bear (Ursus americanus) among fall color, Denali National Park and Preserve, Alaska, United States of America

Mojave National Preserve, Granite Mountains in background, California, United States of America, North America

Mount Redoubt, Lake Clark National Park and Preserve, Alaska, United States of America, North America

An adult brown bear (Ursus arctos) fishing for salmon at Brooks Falls, Katmai National Park and Preserve, Alaska, United States of America, North America

A trio of brown bears (Ursus arctos) fishing for salmon at Brooks Falls, Katmai National Park and Preserve, Alaska, United States of America, North America

Mount Foraker in the fall, Denali National Park and Preserve, Alaska, United States of America, North America

Grizzly bear (Ursus arctos horribilis) (Coastal brown bear) cub, Katmai National Park and Preserve, Alaska, United States of America, North America

Braided river in the fall, Denali National Park and Preserve, Alaska, United States of America, North America

The Cliff Palace Indian dwelling, Mesa Verde National Park, UNESCO World Heritage Site, Colorado, United States of America, North America

Mount Redoubt, Lake Clark National Park and Preserve, Alaska, United States of America, North America