This museum is great if you are into the history of the Saint Louis area, as the exhibits are all geared towards various people, places, and things that shaped the area over the last hundreds of years.
It's a great place to take any tourist that is a history buff, or a resident that is just curious about how St. Louis grew and developed over the years. There are some neat pictures in there too of St. Louis over the years.
Admission is free and parking isn't too bad so take a trip sometime!
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