ocr: Gateway Arch St.Louis, MO About Gateway Arch The Gateway Arch in: St. - Louis is the tallest monument in the United States. The 630-foot (192-meter) archis a symbol of the citys importance as the gateway tot the West for early pioneers. Visitors canride a passenger car toanc observationarea at the top of the monument. The Jateway Archis part of the Jefferson National Expansion Memorial located on the Mississippi riverfront.
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