If you are suffering from the winter blues, the Oak Park Conservatory, 615 Garfield St. (at East Avenue, just south of I-290) could be just what you need. Visitors can indulge in the oxygen-rich air, while listening to the sounds of birds and waterfalls, and enjoying scents of Azalea, orange blossoms and orchids. Chicagoland Gardening magazine once described the Conservatory as small but mighty, a fitting description of this community gem. The Conservatory is open from 10 a.m. to 4 p.m., Tuesday through Sunday, and 2 to 4 p.m., Mondays. Admission is free, but donations are accepted. For more information, call 708.725.2400.