Opera house
In this building, I saw some operas and ballets that I will probably never get the chance to see again - at least not for as inexpensively as I did. Each opera/ballet, if you get standing room tickets, costs the equiv. of $3.50 to $5, depending on where you stand.
Operas I saw: La Boheme, Madame Butterfly, Carmen, The Magic Flute
Ballets I saw: Giselle and The Nutcracker