This Sept. 3, 2017 photo shows a curving river at Theodore Roosevelt National Park in Medora, N.D., marking the landscape in colorful patterns as it interacts with soil and stone. Teddy Roosevelt spent time in the area to grieve after his wife and mother died the same day, and his experiences there turned the future president into one of America's greatest conservationists. He described the area as "a land of vast silent spaces _ a place of grim beauty." (AP Photo/Beth J. Harpaz)
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