Male elk bugling during the fall rut. Large male elk are known as bulls. Male elk have large antlers which are shed each year. Male elk engage in competitive mating behaviors during the rut, including posturing, antler wrestling and bugling, a loud series of screams which is intended to establish dominance over other males and attract females.
Species: Elk, Cervus canadensis
Location: Mammoth Hot Springs, Yellowstone National Park, Wyoming
Image ID: 19693
Vernal Falls at peak flow in late spring, with a rainbow appearing in the spray of the falls, viewed from the Mist Trail.
Location: Vernal Falls, Yosemite National Park, California
Image ID: 12634
A rainbow appears in the mist of the Lower Falls of the Yellowstone River. At 308 feet, the Lower Falls of the Yellowstone River is the tallest fall in the park. This view is from Lookout Point on the North side of the Grand Canyon of the Yellowstone. When conditions are perfect in midsummer, a midmorning rainbow briefly appears in the falls.
Location: Grand Canyon of the Yellowstone, Yellowstone National Park, Wyoming
Image ID: 13319
Grand Prismatic Spring (left) and Excelsior Geyser (right). Grand Prismatic Spring displays a stunning rainbow of colors created by species of thermophilac (heat-loving) bacteria that thrive in narrow temperature ranges. The blue water in the center is too hot to support any bacterial life, while the outer orange rings are the coolest water. Grand Prismatic Spring is the largest spring in the United States and the third-largest in the world. Midway Geyser Basin.
Location: Midway Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 13571
Old Faithful geyser, sunrise. Reaching up to 185' in height and lasting up to 5 minutes, Old Faithful geyser is the most famous geyser in the world and the first geyser in Yellowstone to be named.
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 26939
Yosemite Valley Tunnel View, Storm clouds at sunset, Yosemite National Park.
Location: Yosemite National Park, California
Image ID: 34542
Panorama dimensions: 7653 x 12541
Light Beam in Upper Antelope Slot Canyon. Thin shafts of light briefly penetrate the convoluted narrows of Upper Antelope Slot Canyon, sending piercing beams through the sandstone maze to the sand floor below.
Location: Navajo Tribal Lands, Page, Arizona
Image ID: 28570
A hiker admiring the striated walls and dramatic light within Antelope Canyon, a deep narrow slot canyon formed by water and wind erosion.
Location: Navajo Tribal Lands, Page, Arizona
Image ID: 17993
Yosemite Falls reflected in flooded meadow. The Merced River floods its banks in spring, forming beautiful reflections of Yosemite Falls.
Location: Yosemite National Park, California
Image ID: 26887
Panorama dimensions: 5256 x 11469
North Peak (12,242') rises over lower Conness Lake, its water colored deep blue-green by glacier runoff. Mount Conness (12,589') towers in the upper left. Hoover Wilderness, Inyo National Forest.
Location: Conness Lakes Basin, Hoover Wilderness, California
Image ID: 36427
Panorama dimensions: 7008 x 15585
Lower Falls of the Yellowstone River. At 308 feet, the Lower Falls of the Yellowstone River is the tallest fall in the park. This view is from the famous and popular Artist Point on the south side of the Grand Canyon of the Yellowstone.
Location: Grand Canyon of the Yellowstone, Yellowstone National Park, Wyoming
Image ID: 07769
Lower Falls of the Yellowstone River. At 308 feet, the Lower Falls of the Yellowstone River is the tallest fall in the park. This view is from the famous and popular Artist Point on the south side of the Grand Canyon of the Yellowstone.
Location: Grand Canyon of the Yellowstone, Yellowstone National Park, Wyoming
Image ID: 07770
Lower Falls of the Yellowstone River. At 308 feet, the Lower Falls of the Yellowstone River is the tallest fall in the park. This view is from the famous and popular Artist Point on the south side of the Grand Canyon of the Yellowstone.
Location: Grand Canyon of the Yellowstone, Yellowstone National Park, Wyoming
Image ID: 07771
Narada Falls cascades down a cliff, with the flow blurred by a time exposure. Narada Falls is a 188 foot (57m) waterfall in Mount Rainier National Park.
Location: Narada Falls, Mount Rainier National Park, Washington
Image ID: 28718
Archangel Falls in autumn, near the Subway in North Creek Canyon, with maples and cottonwoods turning fall colors.
Location: Zion National Park, Utah
Image ID: 26097
Yosemite Falls reflected in Flooded Sentinel Meadow, when the Merced River floods Yosemite Valley following a winter of historic snowfall in the Sierra Nevada, Yosemite National Park.
Location: Yosemite National Park, California
Image ID: 39378
Upper Yosemite Falls and lunar rainbow, moonbow. A lunar rainbow (moonbow) can be seen to the left of Yosemite Falls, where the moon illuminates the spray of the falls.
Location: Yosemite Falls, Yosemite National Park, California
Image ID: 27751
Upper Antelope Canyon, a deep, narrow and spectacular slot canyon lying on Navajo Tribal lands near Page, Arizona.
Location: Navajo Tribal Lands, Page, Arizona
Image ID: 35936
Cathedral Peak and Upper Cathedral Lake at Sunset, Yosemite National Park.
Location: Yosemite National Park, California
Image ID: 36419
Panorama dimensions: 7800 x 13628