Could you include reasoning for people who haven't seen either? I can provide pictures if you can't.
For Animal Kingdom here is a photo of one of the exhibits
I have actually been researching Beauval and I'm glad you mentioned this one. It is a great exhibit but the loss of the land is an understandable problem.Well, just next to this impressive Nile hippo exhibit, you get a ridiculously small Pygmy hippo one in Berlin, which is a shame but doesn't take anything from the greatness of the other one. An exhibit that is shared with Egyptian geese and Nyalas.
The hippo exhibit in Beauval is also impressive with many bird species free-ranging. The exhibit doesn't offer much land area for the hippos, so maybe not the best exhibit for them but one of the better looking ones nonetheless.
And another suggestion, a very basic one that doesn't allow any underwater viewing but it seems like a great exhibit, the one in Planète sauvage. Very simple, yet efficient. I am not sure if the sitatunga actually have access to the hippo area, there seems to be some kind of electric wire close to the shore, maybe to prevent the sitatungas from getting in the pool.
Pictures taken by Lintworm and Maxime
That's one reason I enjoyed Indianapolis' orang exhibit - it may not not look naturalistic but it was great to see the apes actually utilize their climbing space.
Ok so this might be the toughest call so far. It appears both Omaha and Chester have issues with their climbing structures. I can find 0 images of orangutans using the climbing structures (except for the nets) at Omaha and it was stated earlier that the Chester climbing structures aren't used. For Indianapolis, the exhibit has great climbing opportunities all around the building and the indoor exhibit is a little grey but still good for apes. Their outdoor exhibits suck, it doesn't look like they tried, they are just grassy concrete pits. Not being naturalistic is ok the problem is the exhibits have no mental enrichments for the apes. If there were other things to climb on in the outdoor exhibits like rocks, logs, or playground equipment that would help but these are just empty pits that lead up to the climbing areas. So after all that I am going to go with San Diego for their openness, their good climbing structures(I have seen the apes use the structures, and good viewing.My personal favourites that I have seen before are at Ohama and Chester.
Ohama:
Ohama's enclosure is well built, and presents a lot of climbing opportunities for their Orangutans. I love the height of enclosure and it also benefits from use of enormous fake banyan trees and extensive climbing ropes.
*photos taken by @snowleopard.
Chester:
Chester's enclosure is enormous. Large climbing poles and fake trees heavily populate the enclosure, and the Orangutans are seen frequently using these. The enclosure also has a lot of flora and most importantly, a lot of space.
