Historic villas dot leafy Hietzing, the 13th District, one of Vienna’s most affluent neighborhoods. Baroque Schönbrunn Palace, the Habsburgs’ summer residence, draws visitors to its opulent interiors, while walkers converge on the manicured gardens and zoo. High society gathers at elegant spots around Hietzinger Hauptstrasse, like Café Dommayer. The vast Lainzer Tiergarten reserve is a popular hiking destination.