The Gateway Arch in St. Louis is a symbol of westward expansion of the United States. It marks the point where Lewis and Clark began their expedition to explore the new territory, and it celebrates the pioneers who helped to settle the American West. The arch is also an engineering marvel, standing 630 feet tall and weighing over 43,000 tons. As such, it is a major tourist attraction and a source of pride for residents of St. Louis and the surrounding area.
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