Switzerland, officially the Swiss Confederation, is a federal republic in Europe. While still named the Swiss Confederation for historical reasons, modern Switzerland is a federal directorial republic consisting of 26 cantons, with Bern as the seat of the federal authorities, called '"federal city". Situated in Western-Central Europe, Switzerland is also a landlocked country geographically divided between the Alps, the Swiss Plateau and the Jura. Spanning the intersection of Germanic and Romance Europe, Switzerland comprises four main linguistic and cultural regions: German, French, Italian and Romansh. Although the majority of the population are German speaking, Swiss national identity is rooted in a common historical background, shared values such as federalism and direct democracy, and Alpine symbolism. One of the most developed countries in the world, Switzerland ranks at or near the top globally in several metrics of national performance, including government transparency, civil liberties, quality of life, economic competitiveness, and human development. Its cities contain medieval quarters, with landmarks like capital Bern’s Zytglogge clock tower and Lucerne’s wooden chapel bridge. The country is also known for its ski resorts and hiking trails.

Paris is the capital and largest city in France, situated on the river Seine in northern France, at the heart of the Île-de-France region. The city of Paris, within its administrative limits largely unchanged since 1860, has an estimated population of 2,193,031, but the Paris metropolitan area has a population of 11,836,970, and is one of the most populated metropolitan areas in Europe. In 2009 and 2010, the city has been ranked among the three most important and influential cities in the world, among the first three "European cities of the future" according to a research published by Financial Times and among the top ten cities in the world in which to live according to the British review Monocle.  The city is the home of the most visited art museum in the world; ''the Louvre'' as well as the ''Musée d'Orsay'' noted for its collection of French Impressionist art, and the ''Musée National d'Art Moderne'' a museum of modern and contemporary art. The notable architectural landmarks of Paris include Notre Dame Cathedral (12th century); the Sainte-Chapelle (13th century); the Eiffel Tower (1889); and the Basilica of Sacré-Cœur on Montmartre (1914). In 2014 Paris received 22.4 million visitors, making it one of the world's top tourist destinations. It is also known for its fashion, particularly the twice-yearly Paris Fashion Week, and for its haute cuisine, and three-star restaurants. Most of France's major universities and grandes écoles are located in Paris, as are France's major newspapers, including Le Monde, Le Figaro, and Libération.

Spain – one of Europe’s most top travel destinations for its fantastic beaches, islands, UNESCO World Heritage sites, stunning and diverse countryside, buzzing nightlife, delicious cuisine and world-famous fiestas! The country is a friendly, multicultural society dedicated to building curious minds, positive attitudes and creative spirits. With great beaches, fun nightlife, many cultural regions and historic cities, Spain makes a great destination for any kind of trip. 

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".

Greece, also known since ancient times as Hellas, is a country located in southeastern Europe. The country has one of the longest histories of any country, and is considered the cradle of Western civilization, having been the birthplace of democracy, Western philosophy, the Olympic Games, Western literature, historiography, political science, major scientific and mathematical principles, and Western drama, including both tragedy and comedy.  Athens, its busy capital, retains ancient landmarks including the 5th-century-B.C.E. Acropolis citadel and Parthenon temple. Greece is also known for its beaches, from the black sands of Santorini to the party resorts of Mykonos. Furthermore it's a geographically appealing place to visit, with a mountainous mainland and idyllic island beaches!

Barcelona – Spain's enchanting capital, second largest and most populous city. It is a huge city that vibrates with life, and there’s certainly not another city in the country to touch it for its sheer style, looks or energy. It is one of the world's leading tourist, economic, trade fair and cultural centers, and its influence in commerce, education, entertainment, media, fashion, science, and the arts all contribute to its status as one of the world's major global cities. Barcelona is home to masterpieces of many great architects – the most famous of which is Antoni Gaudí. 

Piraeus is a city in the periphery of Attica,  Greece and within the Athens urban area, located 12 km southwest of its center and upon the Saronic Gulf. According to the 2001 census, Piraeus has a population of 175,697 people within its administrative limits, making it the third largest municipality in Greece and the second within the Greek capital following the municipality of Athens. The Piraeus urban area extends beyond the administrative city limits to the suburban municipalities, with a total population of 466,065.