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".

Amsterdam is the capital of the Kingdom of the Netherlands. It is the country's largest city and its financial, cultural, and creative centre. Many large Dutch institutions have their headquarters there, and seven of the world's 500 largest companies, including Philips and ING, are based in the city. In 2012, Amsterdam was ranked the second best city in which to live by the Economist Intelligence Unit (EIU) and 12th globally on quality of living for environment and infrastructure by Mercer. Amsterdam derives its name from the city’s origin as “Dam” of river “Amstel”. In the past, the name was "Amstelredamme" which later changed as “Amsterdam”. The city is one of the most popular destinations in Europe, attracting over 7 million international travellers annually. The city is colloquially known as ''Venice of the North'' because of its lovely canals that criss-cross the city, its impressive architecture and more than 1,500 bridges. There is something for every traveller's taste here; whether you prefer culture and history, serious partying, or just the relaxing charm of an old European city!

Cologne is the largest city in the German federal State of North Rhine-Westphalia and the fourth-largest city in Germany. In medieval times it was the largest city of the Holy Roman Empire. It is one of the nation's media, tourism and business hotspots. Cologne is known to be one of the most liberal cities in Germany. Cologne is a traditionally Ripuarian-speaking city, though this has mostly been replaced by German, which is now the main language of the city. English-speaking guides and information are available for many of the landmarks of the city. Cologne's citizens are also very friendly and jovial people, welcoming tourists of all types and with all interests.

Salzburg is the fourth-largest city in Austria and the city of the federal state of Salzburg. The city's ''Old Town'' has internationally renowned baroque architecture and one of the best-preserved city centres north of the Alps. It was listed as a UNESCO World Heritage Site in 1997. The city is noted for its Alpine setting. Salzburg was the birthplace of 18th-century composer Wolfgang Amadeus Mozart. In the mid-20th century, the city was the setting for parts of the American musical and film The Sound of Music, which features famous landmarks in Austria. The musical was a partnership between Richard Rodgers and Oscar Hammerstein II. The capital city of the State of Salzburg, the city has three universities.