The Philadelphia Zoo is located on the west bank of the Schuylkill River. It was approved on March 21, 1859, but due to the American Civil War, it was opened only on July 1, 1874. It is one of the first zoos in the world that is known for breeding animals considered difficult to breed in captivity.
Currently, it covers an area of 17 hectares and is home to over 1300 animal species, many of which are endangered or rare.