When Vietnamese farmer Hồ Khanh stumbled upon this cave in 1991, it was immediately clear the gaping mouth led to a huge, dark, untouched chamber, complete with a free-flowing underground river. What couldn"t have been apparent to him then was that this cave, now known as Sơn Đoòng, is by far the world"s largest by volume.
A universe underground
Today in History
More Desktop Wallpapers:
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Groundhog Day
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Don t forget—it’s World Elephant Day
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Native American Heritage Day
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Golden jellyfish in Jellyfish Lake, Palau
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A notorious advocate for women
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The eloquence of elephants
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Porto Cathedral, Portugal
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Vacuum Chamber 5 at Glenn Research Center
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It s only Wednesday
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Happy Bee Day to you
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Presidents Day
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Happy World Laughter Day
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A little blue
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Happy New Year!
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Reflecting on Black History Month
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50 years of Earth Day
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Channel Country, Australia
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Macro photograph of a migrant hawker dragonfly
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What a twist
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For Hispanic Heritage Month: Out of Many, One
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A horse of many colors
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Burchells zebras for International Zebra Day
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Where fire meets water
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Here we honor the women who ve served
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A rock in a wild place
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Paper lanterns on the longest night
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Pride 2022
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Looking down upon Edinburgh
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Happy 300th, NOLA!
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It’s Opening Day for Major League Baseball