When Mozart was a child, he performed here for Empress Maria Theresa; Franz Joseph I was born and died here, and his unhappy wife, Sisi, presumably sulked inside. Schönbrunn Palace, in the western Hietzing district, naturally invites comparisons to Versailles, as the Hapsburgs built it to rival the French palace. Today, the 1,441-room baroque masterpiece designed by Fischer von Erlach is a World Heritage site, with its Great Gallery and carriage museum among the draws. Its gardens are so vast that a small train takes you around to the palm house, an orangery, and a zoo. The recently renovated, columned Gloriette structure and its café look over the palace and, beyond, Vienna. Schönbrunn’s grandeur never ceases to impress—not bad considering that the palace was only a summer retreat for the Hapsburg rulers.