Though it"s December, it isn"t cold and snowy everywhere in North America. Here, near Tucson, Arizona, the Sonoran Desert stays warm year-round. In this photo, we"re looking at a "sky island"—an isolated, high-elevation woodland surrounded by radically different lowland environments. In this case, the desert land at the base of the mountain is peppered with saguaros—a stately cactus recognized for its long arms. The snow-capped Santa Catalina Mountains in the distance are part of the Madrean Sky Islands and are home to Mount Lemmon Ski Valley, which is the southernmost ski destination in the US. The ski area covers the slopes of Mount Lemmon, which reaches an elevation of about 9,100 feet at the summit and can receive around 180 inches of snow annually.
Sky island views
Today in History
More Desktop Wallpapers:
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National Pearl Harbor Remembrance Day
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Spectacled bear resting in tree, Ecuador
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Giraffes at sunset in the Masai Mara National Reserve, Kenya
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Class, please take out a No. 2 pencil…
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Winter at Valley Forge
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Mont-Saint-Michel
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Reflecting on one of the world s strangest rivers
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Wildebeests in Maasai Mara, Kenya
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Christmas Bird Count turns 125
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Satellite image of sand and seaweed in the Bahamas
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National Trails Day
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Autumn equinox
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Stari Most in Mostar, Bosnia and Herzegovina
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Presidents Day
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Bavljenac Island
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Let s face it: It s World Emoji Day
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La Brecha de Rolando (Rolands Breach), Spain
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Tibetan New Year
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A bridge that rocks
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Don’t get lost in there
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Behold the blood moon
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National Cherry Blossom Festival
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Hues of Hokkaido
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Spotted Lake emerges
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National Pumpkin Day
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Amber Fort, Jaipur, Rajasthan, India
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Via Krupp, Capri, Italy
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River otters at Acadia National Park, Maine
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The Guggenheim turns 60
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The ruins of a Maya superpower
Bing Wallpaper Gallery

