Aria is a movie composed of 10 short films, each centered around a different aria from whatever opera the directors wanted. Some are haunting and beautiful, like Franc Roddam's Tristan und Isolde set in Las Vegas. Some are funny, Julien Temple's take on Rigoletto where a husband and wife each check into the same sex motel with different partners.
Others that stand out are Ken Russell's Nessum Dorma and Derek Jarman's Depuis le Jour.
Some just don't work. Sadly, Robert Altman's Les Boreades never came together for me with its view from the stage into the audience. Jean Luc Goddard's Armide also fails to engage on almost every level.
I like the short film format because even the ones that don't work take chances that you will never see in full length films.