This has got to be the most bare gorilla exhibit ever! I mean its just a field. please correct me if i'm wrong but i'm just judging from what i can see.
There's a couple trees and the wired off plant area. Some other gorilla exhibits are similar to this, they just have a few more hot wired plants/trees.
The Philly gorilla enclosure has an outdoor yard, which is more than can be said for places like Franklin Park and Brookfield, but it must be one of the WORST outdoor yards for gorillas in North America.
Pittsburgh, Cleveland, Jacksonville and Philadelphia all have fields devoid of any naturalism and little enrichment for their gorillas and all are among the worst gorilla exhibits I've seen. National is not much better and neither is Toledo.