If you've never been, the St. Louis Zoo is wonderful! Admission is free, and the Zoo is only down the hill from the, also free, St. Louis Art Museum.
We both love the St. Louis Art Museum! Admission to the museum is free and the museum also often has traveling exhibitions that are worth a visit. Although if you plan on attending, be sure to plan ahead as tickets sell out.
We took engagement photos at the Missouri Botanical Garden - the Garden is absolutely gorgeous! The Climatron is our favorite, and it's open year-round. Admission is $16 or $6 for St. Louis County residents.
9 Mile Garden has a rotation of food trucks for lunch and dinner throughout the week as well as the Canteen, a great place to grab a drink. Sundays will also see pop-up markets with local small businesses - if you're interested, check out the calendar of events on their website!
The tour of the Anheuser-Busch Brewery is a really well-done and informative experience, even if you don’t like beer! Plan ahead for your tour though - the slots do fill up.