NNL Stories

a lake surrounded by red tinged mountains
Summit Lake National Natural Landmark in Clear County, Colorado

Photo by D.Miller

Each National Natural Landmarks adds to the story of our nation's natural history. Explore the stories of fossils, swamps, caves, craters, volcanoes, and more below.
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    Tags: national natural landmarks nnlstories nnl national natural landmark landmark highlights series

    Last updated: March 22, 2022

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