For decades, the Oregon Caves National Monument and Preserve has been Oregon’s quietest national park site, a remote ...
Stalagmites that formed in caves hundreds of thousands of years ago preserve a record of how fires behaved the last time Earth’s temperatures were as high as they are today. New Scientist ...
Under a swath of Kentucky hills and hollows is a limestone labyrinth that became the heartland of a national park. The surface of Mammoth Cave National Park encompasses about 80 square miles.
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