Lincoln Park Zoo, also known as Lincoln Park Zoological Gardens, is a 35-acre (14 ha) zoo in Lincoln Park, Chicago, Illinois. The zoo was founded in 1868, making it the fourth oldest zoo in North America. It is also one of a few free admission zoos in all of North America. The zoo is an accredited member of the Association of Zoos and Aquariums (AZA). The zoo also became an... Wikipedia