Missouri is known for its iconic Gateway Arch, located in St. Louis and symbolizing the "Gateway to the West."

The Gateway Arch, standing 630 feet tall, is the tallest man-made monument in the United States and a symbol of Missouri's role in westward expansion. It was completed in 1965 as the centerpiece of the Jefferson National Expansion Memorial. The arch celebrates the pioneers who journeyed west through St. Louis, which was a key departure point during the 19th century. Visitors can take an elevator to the top for panoramic views of the city and the Mississippi River, making the Gateway Arch a must-see landmark in Missouri and the Midwest.