"The unofficial symbol of St. Louis, the Gateway Arch is the tallest man-made monument in the United States, rising 630 feet into the air. It sits at the center of Gateway Arch National Park, which was established in 1935 to commemorate Thomas Jefferson’s vision of a transcontinental America. In 2018, the park emerged from a five-year, $380 million renovation, which added a grassy pedestrian walkway over the interstate as well as a revamped museum with new exhibits about the construction of the arch and how the expansion of the United States affected Native American communities. Tour the new sites, then take the four-minute, vertigo-inducing tram to the top of the arch, where you can see up to 30 miles east and west on a clear day."