Vorarlberg is the westernmost federal-state (Land) of Austria. Although it is the second smallest in terms of area (Vienna is the smallest) and population (Burgenland is less populated), it borders three countries: Germany (Bavaria and Baden-Württemberg via Lake Constance), Switzerland (Graubünden and St. Gallen) and Liechtenstein. The only Austrian federal state that shares a border with Vorarlberg is Tyrol to the east.