Astana in the country of Kazakhstan boasts two fine examples -
A (not very) old one:
And a new one (just one section of this building I read):
The residents of Astana are fortunate - there is no opera house within a thousand miles of my place of residence, so a newly-aroused interest in opera as an art form will have to be fed via Arte-Fr and similar Inter-web sites.
Astana also has a very grand-looking concert hall:
And talking of concert halls, and oddly enough, in my experience Hong Kong is one of the best cities for live performances of art-music. There is no grubbing and grasping. And there is Cantonese opera on top of that.
Here for good measure is Copenhagen's impressive new opera house: