Vienna is the capital city of Austria with a population of around 1.7 million people. Some of the top sights to see in Vienna include the Prater amusement park, St. Stephan's Cathedral in the heart of the city, the high-end shopping street Maria-Hilfer-Straße, the huge Shopping City South mall, the beautiful Schönbrunn Palace with its zoo, and the Vienna Technical Museum about technology changes. The document encourages visiting these sights and experiencing Vienna.