London – noisy, vibrant, diverse range of people, ideas and frenetic energy – is the capital and largest city of both England and of the United Kingdom. Considered one of the world's leading "global cities", the city remains an international capital of culture, arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, tourism, and transport all contributing to its prominence. Today, among international tourists, London is the most visited city in the world!

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.

Dublin is the largest and capital city of Ireland. The English name is derived from the Irish name Dubh Linn, meaning "black pool". It is a primate city with an urban population of over 1 million, containing almost 25% of the country's population. Dublin is situated near the midpoint of Ireland's east coast, at the mouth of the River Liffey, and at the centre of the Dublin Region. The city is listed by the Globalization and World Cities Research Network (GaWC) as a global city, with a ranking of "Alpha-", placing it among the top thirty cities in the world. It is a historical and contemporary centre for education, the arts, administration, economy and industry.

Prague, is situated on the Vltava River in central Bohemia. It is the capital and largest city of the Czech Republic. The city proper is home to about 1.3 million people, while its metropolitan area is estimated to have a population of over 2.3 million. It has been a political, cultural and economic center of Europe and particularly central Europe for the over 1,100 years of its existence. For centuries, during the Gothic and Renaissance eras, Prague was the permanent seat of two Holy Roman Emperors and thus was also the capital of the Holy Roman Empire. The city played roles in the Protestant Reformation, the Thirty Years' War, and in 20th-century history, both during the two World Wars and during the post-war Communist era. 

Berlin is the capital of Germany. Berlin is also one of the 16 states of Germany. With a population of 3.5 million people, Berlin is Germany's largest city. It is the second most populous city proper and the seventh most populous urban area in the European Union. Located in northeastern Germany on the banks of Rivers Spree and Havel, it is the centre of the Berlin-Brandenburg Metropolitan Region, which has about six million residents from over 180 nations. Due to its location in the European Plain, Berlin is influenced by a temperate seasonal climate. Around one-third of the city's area is composed of forests, parks, gardens, rivers and lakes.

Glasgow is the largest city in Scotland and third most populous in the United Kingdom. The city is situated on the River Clyde in the country's west central lowlands. A person from Glasgow is known as a Glaswegian. Glasgow grew from the medieval Bishopric of Glasgow and the later establishment of the University of Glasgow in the 15th century, which subsequently became a major centre of the Scottish Enlightenment in the 18th century. From the 18th century the city also grew as one of Britain's main hubs of transatlantic trade with British North America and the British West Indies.