Zf365. The concrete walkway shown in image Zf361 would take you the Aviary Bird Cage entrance on this side. There was another entrance like this on the other side of this large bird cage which spread over the Corregidor Engineering Ravine. The concrete foundation posts are still in place but the netting and the bird cage metal framing is gone. The entrance was a double door set up, thru the 1st door; close it, then thru the 2nd door for obvious reasons. This is a 2008 picture.