Interestingly-shaped Aviaries

[Onychorhynchus coronatus]

That's extremely vague. The biggest African Bird Aviary in North America is Scripps Aviary at San Diego which I mentioned earlier. The only Aviary I can think of with good architecture would probably be South Africa at Dallas World Aquarium.
If it’s modern architecture and in a building your probably looking at North Eastern Zoos like Bronx or Philadelphia (neither have it though they’re just examples).

I know it is but unfortunately I can't elaborate on it and trying to find it in the gallery is difficult as there are an enormous amount of zoos in the USA.

 

[KevinB]

I think this aviary housing Black-naped oriole and Red-billed Leiothrix, shaped like a giant old-school bird cage, in the Chinese area at Pairi Daiza would probably qualify.

Also notice the yin and yang design on the floor.

Aviary Black-naped oriole and Red-billed Leiothrix, 2020-09-03 - ZooChat

 

[Onychorhynchus coronatus]

I haven't managed to find the aviary I mentioned in my last comment but I think that for me the most beautiful unusual aesthetic of design in an aviary are those at Saint Louis zoo (never been there so just judging by the pictures).

Photo credit to @snowleopard.

 

[Onychorhynchus coronatus]

@Westcoastperson This is the aviary I mentioned before :

Its at Oregon zoo apparently, as I said before I just find the architecture, aesthetics and planting / landscaping both inside and outside interesting and unusual.

Photo credit to @geomorph.