The Philadelphia Zoo is celebrating its 150th anniversary! 🦁🐾🐯🐒 America’s first zoo – philadelphiazoo – held its grand opening on July 1, 1874. 🥳🎉🎂🐵 #discoverPHL #PhiladelphiaZoo #PhillyZoo #Philadelphia #Philly #AmericasFirstZoo #ZoosOfAmerica #ZoosOfTheWorld #zoo #zoos #animals #milestone #anniversary #celebration