Heller Nature Center
Highland Park, Ill.
Cost: Free. Programs extra.
Hours: Nature center: 8:30 a.m.-5 p.m. Monday-Friday; 9 a.m.-3 p.m. Saturday. Trails: dawn to dusk
This 97-acre preserve features oak-hickory forests, tall grass prairie, oak savanna, natural wetlands, native plants and animals. Check out the log cabin and explore the indoor interpretive center.