PHILADELPHIA ZOO (WPVI) -- The Philadelphia Zoo celebrated the 20th anniversary of its PECO Primate Reserve Wednesday.
In 1999, PECO and Philadelphia Zoo joined forces to create the Primate Reserve.
Since then, more than 23.5 million visitors have visited the Reserve.
The zoo also revealed plans for a new Climbing Wall.
PECO Primate Reserve Anniversary
More TOP STORIES News