Missouri has over 6,000 caves, but the Meramec Caverns are the largest commercial caverns in the state. According to legend, Jesse James used these caves as a hideout during the 1870s. Located only an hour away from the Gateway Arch, these caves are considered St. Louis's "Buried Treasure."
Bring your magnifying glass to the smallest tourist attraction in St. Louis. The Miniature Museum of Greater St. Louis is devoted to miniatures of all sizes, from small to itty-bitty to teeny-tiny. Visit the gift shop, take a class, or attend the twice-yearly Gateway Miniature Fair. The museum is open Wednesday through Sunday.
Once Ulysses S. Grant's personal farm, Grant's Farm now belongs to the Busch family and houses 100 different species of animals, among many other attractions. Ride a tram to see these animals in their natural habitat, and meet a few in the petting areas.
Visit the city's original bowling and martini lounge in The Loop. Pin-Up Bowl opens in the afternoon and closes at 3am. All ages are welcome with a responsible adult, until 9pm when the lounge becomes 21+ and the party starts. Walk-ins are welcome, but be sure to reserve a lane for larger parties because this bowling venue is popular among both tourists and residents of St. Louis.