Cincinnati Zoo Celebrates 135th Anniversary! Posted September 16, 2010CINCINNATI – On Saturday, September 18, the Cincinnati Zoo & Botanical Garden turns 135 years old! As the second oldest zoo in the country, the Cincinnati Zoo is proud of its unique history. To celebrate, the Zoo will offer FREE admission to the first 135 guests through the park on Saturday, September 18, only. (Members are not included, because they already receive free admission with their membership) Originally named the Cincinnati Zoological Garden, the Zoo opened its doors to the public in 1875 – a mere 14 months after the Philadelphia Zoo – led by its founder, Andrew Erkenbrecher. It wasn’t until April 12, 1987 that the name officially changed to the Cincinnati Zoo & Botanical Garden. That same year, the Zoo was designated as a National Historic Landmark by the National Park Service because of its significant historic architecture: the Elephant House, Reptile House (the oldest existing zoo building in America – 1875) and the Passenger Pigeon Memorial. The Zoo’s history remains a valuable part of our city’s rich heritage and an integral part of the community. This weekend, visitors will enjoy meet a keeper talks throughout the Zoo, various animal encounters, giraffe feedings, Cheetah Encounter shows and so much more!