The Museum at the Gateway Arch is located in St. Louis, Missouri, beneath the iconic Gateway Arch. It showcases the history of the westward expansion of the United States, focusing on the Louisiana Purchase and the Lewis and Clark Expedition. The museum features interactive exhibits, artifacts, and multimedia presentations that engage visitors of all ages. Visitors can explore the stories of the people who shaped this era, including pioneers, Native Americans, and explorers. The museum also highlights the significance of the Arch as a symbol of American history and culture. It serves as an educational resource for understanding the nation's past.