What makes the geography of the United States so unique ?

The U.S. borders both the North Atlantic and North Pacific Oceans and is bordered by Canada and Mexico. It is the third-largest country in the world by area and has a varied topography. The eastern regions consist of hills and low mountains, while the central interior is a vast plain (called the Great Plains region).

first paragraph (and busy all the night ,with a silence deep and white )

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