Hidden below the prairie at Wind Cave National Park, you’ll find something unexpected: one of the longest caves on the planet. This site includes 140 miles of explored passageways. What’s above ground is equally special, as the prairie supports one of the most genetically pure herds of bison in the country.
National Park Week: Wind Cave National Park
Today in History
More Desktop Wallpapers:
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Tiny fliers head south
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Astronomy Day
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From pirate port to nature preserve
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A peek behind the royal curtain
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Don t forget—it’s World Elephant Day
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An island hopper s paradise
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American Wetlands Month
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Wild garlic in bloom at Hainich National Park, Germany
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Big wheels on a big mountain
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Kiteboarding and windsurfing in Croatia
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Lanterns alight in Pingxi
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Red fox
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Upper Geyser Basin, Yellowstone National Park
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Merry and bright
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Moselle River loop near Kröv, Germany
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Autumn in the Prosecco Hills
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Rock House in Hocking Hills State Park, Ohio
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Composite of photographs from the Apollo 15 mission
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Happy Independence Day!
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Crimson-rumped toucanet in the Refugio Paz de Las Aves, Ecuador
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Cloughoughter Castle, County Cavan, Ireland
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Pride Month
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Fog above the forest
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Penguin Awareness Day
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White Sands National Park turns 90
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With leaves this tasty, who cares about a view?
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Venice s grand regatta
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It s time to fall back
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Loud waters
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The fantastic winter fox