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Amerique du nord - Greater Yellowstone Ecosystem (137) Images supplémentaires...
Created in 1872, Yellowstone was the very first national park in the world. It is the centerpiece of the 20 million acre Greater Yellowstone Ecosystem, a region that includes Grand Teton National Park and adjacent National Forests. Considered to be the world's largest intact ecosystem in the northern temperate zone, Yellowstone is well-known for its wildlife and is the most popular megafauna location in the Continental United States, occupied by grizzly bears, wolves, bison and elk. It is located primarily in Wyoming but extends into Montana and Idaho.

Yellowstone has many types of ecosystems, including subalpine forest, mountain ranges, canyons, lakes and rivers. The topography has been shaped by lava flows and volcanic rocks from the still-active Yellowstone Caldera, the largest sup
Line of Bison {Bison bison} geysers steaming, Yellowstone National Park, USA.
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Pete Cairns / Line of Bison {Bison bison} geysers steaming, Yellowstone National Park, USA.
Tourists watching the Fountain Paint Pot Geyser erupt. Yellowstone National Park, USA.
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Bryan and Cherry Alexander / Tourists watching the Fountain Paint Pot Geyser erupt. Yellowstone National Park, USA.
Grand Prismatic Spring, Yellowstone National Park, Wyoming, USA
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George McCarthy / Grand Prismatic Spring, Yellowstone National Park, Wyoming, USA
Campsite at twilight, Jenny Lake Campground, Grand Teton National Park, Wyoming, USA
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Jeff Vanuga / Campsite at twilight, Jenny Lake Campground, Grand Teton National Park, Wyoming, USA
Lone Star Geyser erupting in Lone Star Geysyer Basin at night, Yellowstone National Park, Wyoming, USA, October 2007
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Jeff Vanuga / Lone Star Geyser erupting in Lone Star Geysyer Basin at night, Yellowstone National Park, Wyoming, USA, October 2007
Morning glory pool, Old Faithful geyser, Yellowstone NP, Wyoming, USA
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Pete Cairns / Morning glory pool, Old Faithful geyser, Yellowstone NP, Wyoming, USA
Orange Mound Spring in Yellowstone National Park, Wyoming, USA, June 2010.
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Jeff Vanuga / Orange Mound Spring in Yellowstone National Park, Wyoming, USA, June 2010.
Lower falls of the Yellowstone river viewed from Artist point, Yellowstone, USA
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Philippe Clement / Lower falls of the Yellowstone river viewed from Artist point, Yellowstone, USA
Looking over the brink of Lower Falls into Grand Canyon of Yellowstone river, Yellowstone NP, USA.
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Jeff Vanuga / Looking over the brink of Lower Falls into Grand Canyon of Yellowstone river, Yellowstone NP, USA.
People admiring scenery at Brink of the Lower Falls Trail and viewpoint, Grand Canyon of the Yellowstone river, Yellowstone National Park, Wyoming, USA
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Jeff Vanuga / People admiring scenery at Brink of the Lower Falls Trail and viewpoint, Grand Canyon of the Yellowstone river, Yellowstone National Park, Wyoming, USA
Shed antlers of Elk {Cervus elaphus} in Lamar valley, Yellowstone, USA
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Philippe Clement / Shed antlers of Elk {Cervus elaphus} in Lamar valley, Yellowstone, USA
Aerial view of the Grand Prismatic Spring in Midway Geyser Basin, Yellowstone National Park, Wyoming, USA
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Jeff Vanuga / Aerial view of the Grand Prismatic Spring in Midway Geyser Basin, Yellowstone National Park, Wyoming, USA