Vienna is the capital of the Rebuplic of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.723 million (2.4 million within the metropolitan area, more than 25% of Austria's population), and is by far the largest city in Austria, as well as its cultural,economic, and political centre. It is the 10th largest city by population in the Europenean Union. Vienna is host to many major international organizations , such as the United Nations and OPEC.
Vienna lies in the east of Austria and is close to the borders of the Czech Republic,Slovakia, and Hungary. These regions work together in a European Centrope border region. Along with nearby Bratislava. Vienna forms a metropolitan region with 3 million inhabitants, and this region is referred to as Twin City. In 2001, the city centre was designated a UNESCO World Heritage Site.I think if you want to go on an holiday or travel you have to visit Vienna.