Missouri Botanical Garden - Founded in 1859, a National Historic Landmark with 79 acres of scenic landscaping and elegant structures. Sit back and enjoy an informative narrated tram tour of the Garden. Don't miss the Climatron tropical rainforest, Seiwa-en Japanese Garden, and founder Henry Show's Victorian home. Explore the gardens and view the special exhibit. • Gateway Arch - Jefferson National Expansion Memorial - Stands 630 feet and is our nation's tallest man-made monument. Take a tram ride to the top and visit the Lewis and Clark exhibits at the Museum of Westward Expansion.