RM2HBAMW4–Roosevelt Arch, northern entrance to Yellowstone National Park, Gardiner, Montana, United States of America. The design of the Roosevelt Arch has been attributed to architect Robert Reamer, 1903. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMMR–North American pronghorn. Yellowstone National Park, Wyoming, USA. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMPG–North American pronghorn. Yellowstone National Park, Wyoming, USA. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMM9–Marten listening and looking around Yellowstone National Park, Wyoming, USA. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMR0–Marten in a tree. Yellowstone National Park, Wyoming, USA. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMH7–Lone tree and snowy hills in Yellowstone National Park A unique, digitally modified version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMGT–Lower Falls and seasonal ice dam Yellowstone National Park, United Staes of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMMF–Landmark known as 'The Windows', Arches National Park, eastern Utah, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMJM–One-flower helianthella -- Helianthella uniflora. Yellowstone National Park, Wyoming, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBANGN–Palette Spring wtih fresh Snow, Yellowstone National Park, Wyoming, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMMJ–Profile of a moose. Denali National Park & Preserve Alaska, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMH4–Pioneer Register in Capitol Gorge Capitol Reef National Park, Utah, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMFH–Denali and Wonder Lake with Musher Landscape, Denali National Park & Preserve Alaska, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAN68–Tree covered in rime ice near Mud Volcano Yellowstone National Park, Wyoming, United States of America A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBANH0–Looking vertically up through a lodgepole pine fores, Norris Junction. Yellowstone National Park, Wyoming, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMMN–Hikers pause to take in the view. The Denali Park Road is visible in the distance. Denali National Park & Preserve Alaska, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAP3D–Round Prairie and Amphitheater Mountain., Yellowstone National Park. A digitally optimised version of an NPS image, Credit: NPS/J. Peaco
RM2HBAP19–Amphitheater Mountain as seen from Silver Gate, Montana. Amphitheater Mountain, both beautiful and rugged, sits just within the northeastern boundaries of Yellowstone National Park A digitally optimised version of an NPS image, Credit: NPS/J. Peaco
RM2K5DXPX–Trees surround the roof of Glacier National Park's headquarters building covered by an array of photovoltaic solar panels. Changing electricity production away from sources that release greenhouse gases is an essential part of responding to climate change. Since the sun shines for free and the wind blows without payment, turbines and solar panels are generally the least expensive ways to generate electricity. This means that responding to climate change can also save money. Montana, USA. Credit: NPS
RM2JAPCT4–Wupatki National Monument. The Wupatki National Monument is a United States National Monument located in north-central Arizona, near Flagstaff. Rich in Native American archaeological sites, the monument is administered by the National Park Service in close conjunction with the nearby Sunset Crater Volcano National Monument. An optimised version of a US National Park Service. Photo credit: NPS/D.Joyce
RM2HBAP12–Amphitheater Mountain, Yellowstone National Park. A digitally optimised version of an NPS image, Credit: NPS/J. Peaco
RM2HBANF6–Lodgepole pines, Pinus contorta, Yellowstone National Park, Wyoming, United States of America. Credit: NPS/Jacob W. Frank
RM2HBANR2–McDonald Creek, Glacier National Park, Montana A unique, optimised version of an NPS image, Credit: NPS/D. Restivo
RM2HBANE7–Morning fog in the Yellowstone River Valley Yellowstone National Park, Wyoming, United States of America. Credit: NPS/Neal Herbert
RM2HBAP2B–Lower Falls of the Yellowstone River, Yellowstone National Park. A unique, optimised version of an NPS image, Credit: NPS/J. Peaco
RM2HBAP21–Badlands National Park, South Dakota, United States of America A unique, optimised version of an NPS image, Credit: NPS/D. Restivo
RM2JAPCNX–Canyonlands National Park, Utah, United States of America An optimised version of a US National Park Service. Photo credit: NPS/M.Reed
RM2HBANY8–Fishercap Lake, Glacier National Park, Montana, United States of America. A unique, optimised version of an NPS image, Credit: NPS/D. Restivo
RM2HBANTX–Grand Teton National Park, northwestern Wyoming, United States of America. A unique, optimised version of an NPS image, Credit: NPS/D. Restivo
RM2HBANTY–Denali National Park & Preserve Alaska, United States of America A unique, optimised version of an NPS image, Credit: NPS/D. Restivo
RM2HBANYA–Denali National Park & Preserve Alaska, United States of America A unique, optimised version of an NPS image, Credit: NPS/D. Restivo
RM2JAPCW5–Green River Oxbow, Canyonlands National Park, Utah, United States of America. An optimised version of a US National Park Service. Photo credit: NPS
RM2JAPD1E–Dream Lake, Rocky Mountain National Park. Colorado, United States of America. A unique, optimised version of an NPS image, Credit: NPS/M.Reed
RM2JAPCPX–Arches National Park. Utah, United States of America USA. An optimised version of a US National Park Service. Photo credit: NPS/M.Reed
RM2HBANC2–Green Gentian - Frasera speciosa A unique, optimised version of a wildflower image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAP2C–Big Prairie in Glacier National Park. Montana, United States of America. A unique, optimised version of an NPS image, Credit: NPS/D. Restivo
RM2HBAP15–Big Prairie in Glacier National Park, Montana, United States of America. A unique, optimised version of an NPS image, Credit: NPS/D. Restivo
RM2HBANTT–Bison feeding in the snow. Yellowstone National Park, United States of America. A unique, optimised version of an NPS image, Credit: NPS/D. Restivo
RM2JAPCXB–Wintery landscape in Rocky Mountain National Park Fresh snow and blue skies. An optimised version of a US National Park Service. Photo credit: NPS
RM2HBAP3M–Basecamp View Denali National Park & Preserve Alaska, United States of America A unique, optimised version of an NPS image, Credit: NPS/K. Belcher
RM2HBAN6A–Lion Geyser and Heart Spring Yellowstone National Park A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAP45–Spider's web in the woods, Pictured Rocks National Lakeshore, Michigan, United States of America. A digitally optimised version of a NPS image. Credit: NPS
RM2HBANYG–Grand Teton National Park, Wyoming, United States of America. A field of wildflowers A unique, optimised version of an NPS image, Credit: NPS/D. Restivo
RM2HBANY9–Grand Teton National Park, Wyoming, United States of America. A field of wildflowers A unique, optimised version of an NPS image, Credit: NPS/D. Restivo
RM2HBANW6–Mountain Lion Petroglyph Petrified Forest National Park, Arizona, United States of America A unique, optimised version of an NPS image, Credit: NPS/S. Holmes
RM2JAPCX1–Horseshoe Bend at sunset, Glen Canyon National Recreation Area, Arizona, United States of America. An optimised version of a US National Park Service. Photo credit: NPS
RM2HBANF4–Coyote. Yellowstone National Park, Wyoming, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAP3T–Solar Marker at Martha's Butte. Petrified Forest National Park, Arizona, United States of America A unique, optimised version of an NPS image, Credit: NPS/J. Holgerson
RM2HBAP1G–Close up of bison. Cold spring day, Yellowstone National Park, United States of America. A unique, optimised version of an NPS image, Credit: NPS/D. Restivo
RM2JAPD1F–A golden sunset over Grand Canyon National Park at Hakatai Canyon, Arizona, United States of America An optimised / enhanced version of a NPS photo. Credit NPS
RM2HBAMXB–Denali National Park & Preserve, Alaska, United States of America A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMWE–South Window, Arches National Park, Utah, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMWF–Double Arch, Arches National Park, Utah, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAN19–Denali National Park & Preserve, Alaska, United States of America A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBANN5–View of Electric Peak from Sepulcher Mountain, Yellowstone National Park A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAN9W–Electric Peak, Yellowstone National Park, Montana, United States of America A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAP13–The North Fork region of Glacier National Park with golden larch trees. Montana, United States of America. A unique, optimised version of an NPS image, Credit: NPS/D. Restivo
RM2HBANYF–Iceberg Lake Trail lined with Bear grass, Glacier National Park, Montana, United States of America A unique, optimised version of an NPS image, Credit: NPS/D. Restivo
RM2HBAP1T–Two bear cubs rest along the beach. Ursus arctos horribilis Lake Clark National Park and Preserve A unique, optimised version of a NPS image - Credit: NPS
RM2HBANYK–Early morning sunlight on the mountains, Grand Teton National Park, Wyoming, United States of America. A unique, optimised version of an NPS image, Credit: NPS/D. Restivo
RM2HBAMH2–'The Castle', Capitol Reef National Park, Utah, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMXJ–Delicate Arch, Arches National Park, Utah, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMXN–Delicate Arch, Arches National Park, Utah, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMY5–La Sal, Arches National Park, Utah, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAN2T–Denali National Park & Preserve Alaska, United States of America A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAP27–Nanny mountain goat with her kid on Sepulcher Mountain, Yellowstone National Park, United States of America. A unique, optimised version of an NPS image, Credit: NPS/D. Renkin
RM2HBAN17–Denali National Park & Preserve Alaska, United States of America A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMTY–Supermoon at Turret Arch, Arches National Park, Utah, United States of America A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2JAPCPT–Grasshopper in a barren, dry environment at Cleveland-Lloyd Dinosaur Quarry, Utah, USA. An optimised version of a US National Park Service. Photo credit: NPS/M.Reed
RM2HBAN86–Jewel Geyser eruption, Yellowstone National Park, Wyoming, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMH9–Lone tree and snowy hills in Hayden Valley Yellowstone National Park A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAN63–Orange Cliffs, Moab, Canyonlands National Park, Utah, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMWD–Under Double Arch, Arches National Park, Utah, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAN18–Delicate Arch at sunset, Arches National Park, Utah, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAN69–Sipapu Bridge, Natural Bridges National Monument, southeastern Utah, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAN4B–Polychrome Pass, Denali National Park & Preserve. Alaska, United States of America A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAN16–Sipapu Bridge, Natural Bridges National Monument, southeastern Utah, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMW0–Aurora borealis, Denali National Park & Preserve, Alaska, United States of America A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBANJ0–Shafer Trail, in the Sky District of Canyonlands National Park. Shafer Trail switchbacks from Shafer Canyon Overlook. A unique, optimised version of an NPS image - Credit: NPS/Collin Gilmore
RM2JAPD27–Stanton Mountain and frozen Lake McDonald in Glacier National Park, Montana, United States of America. An optimised version of a US National Park Service. Photo credit: NPS/D.Restivo
RM2HBAN4K–Bison group in Lower Geyser Basin in winter Yellowstone National Park A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAN82–Bison and Electric Peak at sunrise Yellowstone National Park, Montana, United States of America A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBANW1–Cow moose feeding in a lake. Denali National Park & Preserve, Alaska, United States of America. A unique, optimised version of an NPS image, Credit: NPS/D. Restivo
RM2HBANR7–Copperhead snake. Big Thicket National Preserve. Agkistrodon contortrix. The eastern copperhead also known as the copperhead is a species of venomous snake. A unique, optimised version of a NPS image - Credit: NPS
RM2HBAN13–Sunset sky, Denali National Park & Preserve Alaska, United States of America A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMPP–Double Rainbow, Denali National Park & Preserve. Alaska, United States of America A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMW6–Bull Moose, Denali National Park & Preserve. Alaska, United States of America A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAMWB–aurora borealis, Denali National Park & Preserve, Alaska, United States of America A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2JAPD24–Pine forest with snow on the ground, Rocky Mountain National Park scenery in December. Colorado, United States of America A unique, optimised version of an NPS image, Credit: NPS/M.Reed
RM2HBANPP–A grizzly and her young cub Ursus arctos horribilis Denali National Park & Preserve Alaska, United States of America A unique, optimised version of an NPS image, Credit: NPS/M. Lewandowski
RM2HBAN84–Fountain Paint Pot bubble burst, Yellowstone National Park, Wyoming, nited States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBANHM–Bubbling pools at Fountain Paint Pot, Yellowstone National Park, Wyoming, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBAN4G–Wolf. Canis lupus. Denali National Park & Preserve Alaska, United States of America A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBANR5–View of Electric Peak from Sepulcher Mountain, Yellowstone National Park, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBANBM–Bull elk photographed in snow in Yellowstone National Park, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBANN4–Dusk glow, Mammoth Hot Springs Yellowstone National Park, Wyoming, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBANN2–Visitor exploring Mammoth Terraces at Sunset, Yellowstone National Park, Wyoming, United States of America. A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2HBANHP–Great Fountain Geyser, Lower Geyser Basin Yellowstone National Park, United States of America A unique, optimised version of an image by NPS Ranger JW Frank; Credit: NPS/Jacob W. Frank
RM2JAPCW3–Karst Topography at Cumberland Gap National Historic Park. The park lies along the borders of Kentucky, Tennessee and Virginia. An optimised version of a US National Park Service. Photo credit: NPS/D.Pate
RM2HBANYE–Many Glacier is an area within Glacier National Park which is located in the U.S. state of Montana, United States of America. A unique, optimised version of an NPS image, Credit: NPS/D. Restivo
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