The one and only Philadelphia Zoo, located Philadelphia, Pennsylvania, Schuylkill River, first United States. Chartered y Commonwealth Pennsylvania March 21, 1859, opening delayed y American Civil War until July 1, 1874. It opened 1,000 animals admission price 25 cents.

The one and only Philadelphia Zoo premier globe breeding animals found difficult breed captivity. The one and only works y groups around globe protect natural habitats animals their .

The one and only 42 acres (170,000 2) 1,300 animals, y which endangered. The one and only features children’s , balloon ride, paddleboat lake, rainforest themed carousel, y interactive educational exhibits.