According to Away.com:
Experience a slice of life as the Hapsburgs did at Schloss Schönbrunn, the summer palace of Austria’s powerhouse ruling family. Located in Vienna’s Hietzing district, the palace features baroque gardens, lavish Rococo-style rooms, and the world’s oldest zoo, formerly the private menagerie of the imperial family. Get lost in the hedge maze, take a night tour of the Palm House, and on Sunday mornings enjoy brunch, live music, and a view of Vienna from the Gloriette, a magnificent building constructed under the reign of Emperor Joseph and Empress Maria Theresia.
Check out WatchMojo’s travel video on Austrian castle country: