The Arch
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The Gateway Arch is a 630-foot-tall monument in St. Louis,
Missouri, United States. Clad in stainless steel and built in the
form of a weighted catenary arch, it is the world's tallest arch
and Missouri's tallest accessible structure. Some sources consider
it the tallest human-made monument in the Western Hemisphere. Built
as a monument to the westward expansion of the United States and
officially dedicated to "the American people", the Arch, commonly
referred to as "The Gateway to the
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