On 19 Sept 22, son Ian & I arrived in Vienna by GoOpti from Ljubljana. Settled in our Airbnb adjacent to the palace, found a nice tavern and burger, strolled the city. In front of the Opera house many "period" dressed men hawked some sort of concert.
Son Ian asked, "Do you want to see the Opera?' which started within 45 minutes. Opera? Traveled to Vienna to see my Renaissance Art as a voracious fan, but not necessarily a opera fan, I said, "Why not?"
Found the booth on the opposite side of the Opera house and bought standing room tix for Don Giovanni-- only 15 Euros each!
Raced up the marble stairs 3 flights to enter this magnificent arena/hall. Orchestra entered and played some of the most marvelous live music I ever heard. Small screens by our standing room places showed "close-captions" in our English as the performers sang.
A spontaneous suggestion/decision/adventure: a world class opera in Vienna! A lifetime terrific travel experience.