Yellowstone National Park: Stunning photos celebrate 150 years of nature and wildlife

The sun begins to set on the Hayden Valley landscape at Yellowstone State Park.  (Jackson Hole EcoTour Adventures/ @Joshmettenphoto)

Bison spotted during sunrise in Lamar Valley at Yellowstone National Park.  ((Jackson Hole EcoTour Adventures/ @Joshmettenphoto))

Roosevelt Arch north entrance to Yellowstone National Park in Gardiner, Montana, in afternoon light in summer.  (Education Images/Universal Images Group via Getty Images)

A bull bison stands atop a mountain in Yellowstone National Park.  (Jackson Hole EcoTour Adventures/ @joshmettenphoto)

A wolf is spotted in Yellowstone National Park.  (Jackson Hole EcoTour Adventures)

Yellowstone National Park;s entrance with a far-off mountain view. (iStock)

A grizzly bear fishes in a creek at Yellowstone National Park.  (Jackson Hole EcoTour Adventures/ @joshmettenphoto)

A wolf can be seen in the distance at Yellowstone National Park.  (Jackson Hole EcoTour Adventures/ @joshmettenphoto)

Travelers view Yellowstone National Park thermal features during snowy winter.  (Jackson Hole EcoTour Adventures/ @Joshmettenphoto)

Visitors watch bison and their newborns as they cross the road in Yellowstone National Park on June 8, 2021. (Photo by William Campbell/Getty Images)

Blue skies are seen overhead in Hayden Valley at Yellowstone State Park. (Jackson Hole EcoTour Adventures/ @Joshmettenphoto)

A wolf from the Wapiti Lake pack silhouetted by a nearby hot spring in Yellowstone National Park on Jan. 24, 2018. (Jacob W. Frank/National Park Service via AP, File)

Yellowstone Falls — Grand Canyon of the Yellowstone — in Yellowstone National Park, Montana. (iStock)

A bison spotted in the distance among the widespread Wyoming landscape.  (Jackson Hole EcoTour Adventures/ @joshmettenphoto)

A marmot sits on a rock at Yellowstone National Park.  ((Jackson Hole EcoTour Adventures/ @joshmettenphoto))

Yellowstone River Upper Falls.  (Jen Golotko/Fox News Digital)

A wolf howls on a snowy Yellowstone National Park landscape. (Jackson Hole EcoTour Adventures/ @joshmettenphoto)

The Grand Prismatic Spring, the largest in the U.S. and third largest in the world, is seen in Yellowstone National Park, Wyoming, on June 22, 2011. (REUTERS/Jim Urquhart/File Photo)

Cutthroat trout swimming at Yellowstone National Park in Wyoming.  (Jackson Hole EcoTour Adventures/ @Joshmettenphoto)

Pronghorn antelope are spotted in Yellowstone National Park.  ((Jackson Hole EcoTour Adventures/ @joshmettenphoto))

A great gray owl sits atop a branch at Yellowstone National Park. ((Jackson Hole EcoTour Adventures/ @joshmettenphoto))

Yellowstone National Park landscape with Upper Falls of Yellowstone River in the distance. (Jen Golotko/Fox News Digital)

A bull elk plays in the snow at Yellowstone National Park.  (Jackson Hole EcoTour Adventures/ @joshmettenphoto)

Senior couple at the summit of Mount Washburn, the highest point in Yellowstone National Park. (Getty Images/ Allison Achauer)

An elk calf in Yellowstone National Park poses for the camera.  (Jackson Hole EcoTour Adventures/ @joshmettenphoto)

A cow and calf bison cozy up while roaming Yellowstone National Park.  (Jackson Hole EcoTour Adventures/ @joshmettenphoto)

A black bear roams among the wildflowers in Yellowstone National Park.  (Jackson Hole EcoTour Adventures/ @joshmettenphoto)