#19 – Vienna
Vienna is the capital city of Austria. Not only is it the largest city in Austria, but also the seventh largest city by population in the European Union. Known as the City of Music for its musical legacy, it has a rich history in music. This city has many palaces, churches, shops, castles, museums and other architectural wonders. Beautiful attractions to check out include the Schonbrunn Palace, the Prater, Hofburg Palace, the Vienna State Opera, and the Leopold Museum.