Slovakia (Slovak: "Slovensko") (Official name The Slovak Republic, "Slovenská republika") is a country with no access to the ocean in Central Europe. It is bordered by Austria in the southwest, Hungary in the south, Ukraine in the east, Poland in the north and Czech Republic in the northwest. Its capital city is Bratislava, the only capital of the world that borders with other two countries. Other main cities are Košice, Prešov, Žilina, Banská Bystrica, Trenčín, Nitra and Trnava. Slovakia has been a member of the European Union since 2004 and its official currency is the Euro.