Olympia Fields, Ill.
Cost: Free. Some programs extra.
Hours: Trails: dawn to dusk, daily. Building: 8 a.m.-5 p.m. Monday-Friday. Weekends by appointment.
This 38-acre nature preserve is home to a diversity of wildlife and habitat types. See beautiful woods, flora and fauna on the trails along both sides of the park. Parking is available on the south side of Vollmer Rd. Explore the Discovery Center which includes several exhibits.