Hey, Simon and Garfunkle knew it was all happening at the Zoo. Now, thanks to SyFy TV and the Ghost Hunters, we know it's the Philly Zoo that they were talkin' about. America's First Zoo opened on July 1, 1874, after a long delay brought on by the Civil War; its charter was originally approved in 1859. And, of course, it was rumored to be built on a Native American burial ground. The zoo staff has reported a wide range of ghostly activity over the years.