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Badlands National Park, South Dakota

Rock formations in the park.
Rock formations in the park. Photo: Wikimedia Commons

The Badlands have been a reservoir for paleontology for well over a century. Members of the Oglala Lakota had been finding fossilized remains well before paleontology was a formal discipline, according to the National Parks Service. The park has yielded thousands of fossil specimens from millions of years of Earth’s history. From the large mammalian brontotheres to the reptilian mosasaurs, which swam in the ancient seas that gave way to the Badlands, there’s plenty to explore.