"بوابة الغرب" (Gateway of the West) is a prominent landmark located in St. Louis, Missouri. It is known for its iconic Gateway Arch, which symbolizes the westward expansion of the United States. The arch stands at 630 feet tall, making it the tallest monument in the country. The site serves as a national park, offering visitors a chance to learn about the history of westward migration and the role of St. Louis as a starting point for pioneers. The area includes a museum and observation deck, providing stunning views of the city and the Mississippi River.