The St. Louis Arch, also known as the Gateway Arch, is located in Missouri and symbolizes the westward expansion of the United States.

The St. Louis Arch, officially named the Gateway Arch, is a world-famous landmark in St. Louis, Missouri. Standing 630 feet tall, it is the tallest man-made monument in the U.S. and an iconic symbol of the westward expansion during the 19th century. Completed in 1965, the Arch is the centerpiece of the Gateway Arch National Park, which includes a museum and access to the Mississippi River. Designed by architect Eero Saarinen, its sleek, stainless steel structure attracts millions of visitors annually. The Arch offers tram rides to the top, providing breathtaking views of St. Louis and the surrounding areas.