You can visit the Levine Museum of the New South, at 200 East 7th Street, for free every Sunday from 12pm to 5pm. If you park at 7th Street Station, bring your parking ticket to guest relations at the Levine Museum. You can get it validated for all day on weekends. (During the week you can get it validated for two hours.)
Current exhibits include Cotton Fields to Skyscrapers, the permanent exhibit chronicling the development of the New South, Courage, the story of fight against school segregation, and Para Todos Los Niños, which documents the struggle of Latino families in California.