Vienna is divided into 23 districts. At the core is district I, the Innere Stadt, which contains most of the city's famous structures. The old city is characterized by narrow alleys and monumental buildings. Surrounding the heart of the city is the Ringstrasse, or Ring, a circular road lined with grand buildings, monuments, and parks. Beyond the Ring are the inner suburbs (districts II-IX). Leopoldstadt (district II) encompasses the famous 3,200-acre (1,295-hectare) Prater, formerly the hunting and riding preserve of the aristocracy, but since 1766 a public park whose amenities include a stadium, fairgrounds, racetracks, and many restaurants. Beyond another ring road, the Gürtel, lie the outer suburbs (districts X – XXIII), which are largely residential. Also beyond the Gürtel is the vast Central Cemetery, where many great musical figures and other famous Viennese are buried.