Schönbrunn Palace (or Schloss Schönbrunn) is one of the most popular tourist attractions in Vienna, visited by 3.8 million visitors in 2017 alone. The palace was the summer residence of the Habsburgs, including Emperor Franz Joseph and his wife Empress Elisabeth, better known as Sisi. With 1,441 rooms, the palace was a stunning example of Baroque architecture with Rococo interiors, and visitors can explore the restored Imperial Apartments as well as the stunning gardens, which contain a maze, fountains, statues, and the Gloriette. Ticket queues on the day can be extremely long, so book in advance to skip the line!