 | | See a new picture every day and download free wallpaper. |
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 | | Photographer Peter Essick provides a glimpse into Portugal's only national park in this gallery of images. |
 | | See the most popular Photo of the Day images from May, featuring a gold miner in Mozambique, and more. | | | 
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 | | Explore 15 classic hikes chosen by author Peter Potterfield, including tips and advice on getting the most out of your experience. |
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