The Old Courthouse situated downtown, just blocks from the City Garden, is a genuine delight for American history buffs. The restored courthouse shows some of the splendor of the 1800's along with the darker side of slavery in America.
This is the site of the famous Dred Scott trial which I learned about as a kid in school. Sadly, neither of my children had been taught about this brave man and his trials as both a slave and "freed man". To walk the same floors that he walked gave me a sense of awe as well as connection to Dred and his journey in life.
Definitely worth the stop! There is no admission, a free short film talks about the history of the courthouse and there is a nice and reasonably priced souvenir store inside.