Gateway Arch National Park

The Gateway Arch National Park in St. Louis, Missouri, stands as the nation's tallest monument and one of its most iconic landmarks, commemorating the pivotal role of St. Louis as the departure point for the Lewis and Clark Expedition and the broader era of American westward expansion. The stainless-steel catenary arch, designed by Finnish-American architect Eero Saarinen and completed in 1965, soars 630 feet above the west bank of the Mississippi River, anchoring what was once the historic core of 19th-century St. Louis.

Beneath the Arch lies the Museum of Westward Expansion, a federally managed institution tracing the history of the Louisiana Purchase of 1803 and the subsequent movement of settlers, traders, and military forces across the continent. The museum's galleries feature original journals from the Lewis and Clark Expedition, Native American artifacts, period weapons and tools, and large-scale dioramas depicting frontier life. A short film on the construction of the Arch itself is screened throughout the day and documents the remarkable engineering challenge of erecting a monument with no internal scaffolding.

The national park also encompasses the Old Courthouse, a Neoclassical-Revival structure dating to 1839 where the first two trials in the landmark Dred Scott case were held in 1847 and 1850, placing the site at the center of the constitutional crisis that preceded the Civil War. The Old Courthouse's restored rotunda features ornate coffered ceiling murals and a permanent exhibition tracing Missouri's legal and political history.

A ride to the apex of the Arch via its distinctive tram system—small pod-like cars that tilt to follow the curve of the monument—provides panoramic views over the Mississippi River, downtown St. Louis, and the Illinois flatlands to the east. The tram journey takes approximately four minutes each way. The park was redesignated from Jefferson National Expansion Memorial to Gateway Arch National Park in 2018, aligning it with the National Park Service's broader network. Restoration of the surrounding Luther Ely Smith Square and the riverfront plaza was completed the same year, opening new green space and improved visitor facilities adjacent to the river.