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Lake Toba, Indonesia, 1980
Photo: Lake Toba
WALLPAPER

About 74,000 years ago, a volcano erupted and collapsed in on itself on Sumatra. The resulting crater later filled with water and became known as Lake Toba (pictured).

(Photograph shot on assignment for, but not published in, "A Sumatran Journey," March 1981, National Geographic magazine)

Photograph by David Alan Harvey

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