Rollins Museum of Art gives Orlando a quieter art stop away from the theme-park circuit. Set on the Rollins College campus in Winter Park, it shows work from a serious teaching collection, with European paintings, American art, prints, and changing exhibitions that are small enough to see without rushing.
Pair it with a walk around Winter Park's brick streets, lakeside campus, and cafes. It is especially useful if you want a cultural half-day north of downtown Orlando.