The Best Places to See Fossils in the United States | Page 5 of 12

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Petrified Forest National Park, Arizona

A petrified tree on its side. — A petrified tree on its side. Photo: Wikimedia Commons

Known for its Triassic fossils, Petrified Forest National Park is well worth a stop if you’re in Arizona. The world as it existed over 200 million years ago has been frozen in time for your viewing pleasure, in the form of petrified trees and fossilized plants and animals—not to mention the living desert denizens that occupy the landscape today.

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