Lincoln Park Zoo is a world of wildlife in the shadow of skyscrapers. Located within a verdant park just minutes north of Chicago, the zoo has been a natural, free oasis for generations of animal lovers, who come to hear a lion’s roar echo off nearby apartment buildings, see gorillas climb trees as the Sears Tower looms in the distance, or forget where they are as they immerse themselves in a tropical rainforests, dry-thorn forests or spacious savannas.