Budapest is the capital of Hungary. As the largest city of Hungary, it serves as the country's principal political, cultural, commercial, industrial, and transportation centre. In 2010, Budapest had 1,721,556 inhabitants, down from its 1980 peak of 2.06 million. The Budapest Commuter Area is home to 3,271,110 people. The city covers an area of 525 square kilometres (202.7 sq mi) within the city limits. Budapest became a single city occupying both banks of the river Danube with a unification on 17 November 1873 of right (west)-bank Buda and Óbuda with left (east)-bank Pest. Budapest is one of Europe's most delightful and enjoyable cities. Due to its scenic setting and its architecture it is nicknamed "Paris of the East".

Basel is one of the important cities of Switzerland. One of Switzerland's underrated tourist destinations, Basel has a beautiful medieval old town centre, a vibrant Carnival, and several world class art museums built by architects like Renzo Piano, Mario Botta and Herzog & De Meuron. Basel is also rich in architecture old and new, with a Romanesque Münster (cathedral), a Renaissance Rathaus (town hall), and various examples of high quality contemporary architecture, including more buildings by Herzog & De Meuron, Richard Meier, Diener & Diener, and various others. Located in the Dreiländereck (three countries' corner), Basel is a gateway to the Swiss Jura mountains and nearby cities of Zürich and Lucerne, as well as the neighbouring French region of Alsace and the German Black Forest.