This natural landmark in Wyoming was the first national monument in America. Name that "tower".

Located in Wyoming, Devils Tower became the first national monument in the United States in 1906. Declared a national monument by President Theodore Roosevelt, amidst the 1,347-acre monument grounds stands a 867-foot butte that looms darkly 1,267 feet above the Belle Fourche River. The place is a hellscape; no wonder it's called Devils Tower.

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