Cirque du Soleil is amazing, isn't it?
I've been a couple of times, in Vegas as well as under the Big Top in Toronto.
Cirque has multimedia clips of some of the shows
here for those who haven't experienced it.
I've worked on projects with the architects who designed the theatre for "O" at Bellagio, in Las Vegas, as well as many other amazing facilities.
If you're interested in digital architecture, my good friends at Sceno Plus in Montreal are the best in the world designing show space.
The Sceno Plus
portfolio illustrates their unique work with digital images and multimedia.