Graben Hotel - Vienna, Austria     

Major tourist attractions include the imperial palaces of the Hofburg and Schönbrunn (also home to the world's oldest zoo, Tiergarten Schönbrunn) and the Riesenrad in the Prater. Cultural highlights include the Burgtheater, the Wiener Staatsoper, the Lipizzaner horses at the Spanish Riding School and the Vienna Boys' Choir, as well as excursions to Vienna's Heuriger districts.

There are also a number of art galleries, such as the Albertina, Belvedere, Museumsquartier, KunstHausWien and BA-CA Kunstforum. Popular museums include the museums in the Hofburg, the twin Kunsthistorisches Museum and Naturhistorisches Museum and the Technisches Museum, each of which receives over 250,000 visitors per year [6].

Sites associated with the many composers who lived in Vienna are also popular, such as Beethoven's various residences and St. Marx cemetery, Mozart's final resting place. Vienna's many churches also draw large crowds, the most famous of which are St. Stephen's Cathedral, the Deutschordenskirche, the Jesuitenkirche, the Karlskirche, the Peterskirche, Maria am Gestade, the Minoritenkirche, the Ruprechtskirche, the Schottenkirche and the Votivkirche.

Modern attractions include the Hundertwasserhaus, the United Nations headquarters and the view from the Donauturm.