Tucked inside the Gateway Arch is a small museum dedicated to the days of Lewis and Clark: The Museum of Westward Expansion.
The Museum of Westward Expansion explores the nineteenth century expansion from the Mississippi River to the Pacific Ocean with artifacts, photos, animatronic figures (which, sadly, were not animated while I was there), and more.
UPDATE: The Museum of Westward Expansion closed in 2015.
Site: Museum of Westward Expansion
Location: St. Louis Riverfront, St. Louis, MO 63102
Hours: Open daily except Thanksgiving, Christmas and New Year’s Day. Winter hours (Labor Day – Memorial Day), 9 a.m. – 5 p.m.; Summer hours (Memorial Day – Labor Day), 8 a.m. – 10 p.m. Hours subject to change.
Date: March 20, 2010