Vienna is the capital of Austria and the country's epicenter for tourism, culture, business, and politics. The city was once the focal point of the Habsburg Empire and Vienna's imperial city centre is a UNESCO World Heritage site. Bratislava on the Danube River has historic palaces, a medieval Old Town, and an interesting set of churches, museums and art galleries. It is the capital and largest city of Slovakia. Located in the southwest of the country, Bratislava is under one hour's drive from Vienna and is the only national capital in the world that borders two other countries (Hungary and Austria).