"So if you care to find me—look to the western sky!" Defying Gravity is unspeakably amazing, in person or on the soundtrack.
In the show, towards the climax of the song, they lifted the actress up on a cable as pretty much every resource the stage crew had available was incorporated to make the scene as unbelievably epic as possible. It really must be experienced to be understood.
Even the moment that leads up to Elphaba being lifted up is epic. Elphaba and Glinda have just wished each other happiness, and Elphaba runs off. Then a bunch of guards attack Glinda, thinking she's the one they're after. We then hear Elphaba's voice shouting at them to release her, for it's not Glinda they want, it's her. Cue epic lifting moment and climax of the most epic musical theatre song in years.
Glinda's epic takeover of Ozian politics at the end of the musical, starting by ordering the Wizard out of Oz and sending Morrible straight to jail with an Ironic Echo.
Glinda: Madame, have you ever considered how you'd fare in captivity?
Meta example: Dutch actress Willemijn Verkaik has played the role of Elphaba in four countries and three languages; her native Dutch in Holland, German in Germany, and English both on Broadway and in the West End. No other actress even comes close.