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These 10 national monuments are some of the best hidden gems in the whole national park system

National monuments are areas of federal land protected for their significant historical, cultural, or scientific importance.
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17 Best U.S. National Monuments to Visit Before You Die

Everyone knows about Yellowstone and the Grand Canyon, but did you know the U.S. is home to over 130 national monuments just waiting to be explored? America is packed with jaw-dropping natural wonders ...