Through Sept. 30. Featuring the watercolors of Tom Hempel. On the main gallery wall the central painting is of a working towboat on the Mississippi River. Paintings to the right (west) are mostly of Iowa landscapes and paintings to the left (east) depict Illinois themes. Gallery hours: 10 a.m. to 9 p.m. Tuesdays and Thursdays and 10 a.m. to 5 p.m. Wednesdays, Fridays and Saturdays. Free.