Morton Arboretum

In 1922, salt company magnate Joy Morton established this tree haven on 175 acres. Today it spans 1,700 acres of woodlands, gardens, wetlands and other natural areas. The backyard gardener or landscape professional can sign up for classes or learn about nature in a 27,000-volume library featuring 5,000 rare books, 62 rare magazine titles and 1,500 pre-20th-century nursery catalogs.