The orangutan and gibbon are ugly but I think that the gorilla exhibit is very nice because if you look at the back wall it is supposed to be a logging camp so that is why there is a giant stump. Also you can view the exhibit from a moat so there is not obstructions in your viewing. I think the entire African Rain Forest Pavillion is amazing there are so many viewing opportunities for the main gorilla exhibit so it makes it easy to spot the gorillas. It is also the only indoor exhibit that I have seen that has grass and plants in it. I think that Cincinati's indoor exhibit is ugly and too dark.
Then it must be the photo, the lighting of the viewing area is dark. Also this must have to be an exhibit you need to see (indoors) because I can assure you it isn't ugly.