Saint Petersburg is a city and a federal subject (a federal city) of Russia located on the Neva River at the head of the Gulf of Finland on the Baltic Sea. In Russian literature, informal documents and discourse, the word "Saint" is usually omitted, leaving "Petersburg". The city is often described as the most Westernized city of Russia, as well as its cultural capital. It is the northernmost city in the world with a population of over one million. The Historic Centre of Saint Petersburg and Related Groups of Monuments constitute a UNESCO World Heritage Site. The city is home to The Hermitage, one of the largest art museums in the world. A large number of foreign consulates, international corporations, banks, and businesses have offices in Saint Petersburg. Talking of churches, Church of the Savior on the Blood is said to be the most beautiful church in St. Petersburg. Built of beautiful mosaic and stonework, the church gives you an indication of how ancient Russia looked like. The church is built at an equally historic spot. This is where Tsar Alexander II was assassinated in the year 1881.

Stockholm - Sweden's capital and largest city, and the most populous city in the Nordic region. Without a doubt, Stockholm is one of the most beautiful cities in Europe. The city is made up of 14 islands connected by some 50 bridges on Lake Mälaren, which flows into the brackish Baltic Sea, and passes the Stockholm archipelago with some 24,000 islands and islets. The city is a cosmopolitan place with both classical and modern architecture, and a captivating Old Town, Gamla Stan. Today, the area is an atmospheric mixture of buildings surrounded on all sides by a latticework of medieval lanes and alleyways.

Tallinn is the capital and largest city of Estonia. It occupies an area of 159.2 km2 (61.5 sq mi) with a population of 412,144. It is situated on the northern coast of the country, on the banks of the Gulf of Finland, 80 km (50 mi) south of Helsinki, east of Stockholm and west of Saint Petersburg. Tallinn's Old Town is in the list of UNESCO World Heritage Sites. Tallinn is ranked as a global city and has been listed among the top 10 digital cities in the world. Tallinn is a European Capital of Culture for 2011, along with Turku, Finland.

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.

Helsinki is the capital and largest city in Finland. Finland's major political, educational, financial, cultural, and research center as well as one of northern Europe's major cities, Helsinki was ranked the most liveable city in the world, in 2011. Approximately 75% of foreign companies operating in Finland have settled in the Helsinki region. The nearby municipality of Vantaa is the location of Helsinki Airport, with frequent service to various destinations in Europe and Asia. Today, Helsinki pulls off the trick of being something of an international metropolis while still retaining a small-town feel. The best time to visit is in summer, when Finns peel off their overcoats and flock to outdoor bars and cafes to enjoy the sunshine.