Went after this TB when I saw where it was, at the base of a rusty lookout tower from the Vietnam war, perched high on a mountain surrounded by jungle! Too bad I took the wrong trail and had to backtrack through heavy, rocky jungle and start over. This was one of the coolest caches I've ever found. I assume it was put there because the park on this island is home to a species of monkey that is endangered.
I have plans to take this to an actual zoo, thousands of miles away. :)