@snowleopard Honestly, I don't see it. Sure, it's a pit-like design, but the orangs have access to *live* plants and are able to hide away from the general public if they so desire. Only thing I'd change would be the indoor quarters to be a modern set of dayrooms, and some Auckland-esque climbing for the outside spaces.
@snowleopard Oh, I see... Have I just been Mandela-ing trees in my memory for years? Maybe I kept confusing it with the trees in the Gorillas exhibit...