See a photo of a gathering of men in a town in Algeria by Franklin Price Knott and download free wallpaper from National Geographic.

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See a photo of waves crashing over a beach in Iceland and download free wallpaper from National Geographic.

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See a photo of people enjoying a warm evening along the Sydney Harbour, from National Geographic.

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See a photo of two men looking toward snow-covered peaks in the Caucasus by Vittorio Sella and download free wallpaper from National Geographic.

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See a photo of people enjoying a warm evening along the Sydney Harbour, from National Geographic.

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See a photo of a Kyrgyz woman walking through her community along the shore of Karakol Lake, from National Geographic.

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See a photo of a pair of gentoo penguin chicks in Antarctica and download free wallpaper from National Geographic.

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See a photo of people enjoying a warm evening along the Sydney Harbour, from National Geographic.

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National Geographic provides free maps, photos, videos and daily news stories, as well as articles and features about animals, the environment, cultures, history, world music and travel.

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Read photographer Carsten Peter's biography and see related photo galleries and more from National Geographic.

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See a photo of an eastern screech owl camouflaged in a tree in the Okefenokee Swamp in Georgia and download free wallpaper from National Geographic.

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See a photo of an underwater cave in the Bahamas by Wes C. Skiles, and download free wallpaper from National Geographic.

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See a photo of an ice canyon in Greenland by James Balog, and download free wallpaper from National Geographic.

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See a photo of waves crashing over a beach in Iceland and download free wallpaper from National Geographic.

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See a photo of a school of spadefish by Brian Skerry and download free wallpaper from National Geographic.

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Black-and-white photos and wallpapers featuring historical scenes, early 20th century photos, Native Americans, and more from National Geographic.

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See a photo of waves crashing over a beach in Iceland and download free wallpaper from National Geographic.

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See a photo of a skyscraper in Tokyo and download free wallpaper from National Geographic.

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