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Thingvellir National Park, Iceland
Photo: Thingvellir National Park in Iceland
WALLPAPER
Hikers walk in the shadow of cliffs in Iceland's Thingvellir National Park. The divergent Mid-Atlantic Ridge rises above sea level at Thingvellir, with the North American plate to the west and the Eurasian plate to the east.
Photograph by Crispin Rodwell/Alamy

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