Amsterdam is the capital city and most populous municipality of the Netherlands. Its status as the capital is mandated by the Constitution of the Netherlands, although it is not the seat of the government, which is The Hague. Amsterdam has a population of 851,373 within the city proper, 1,351,587 in the urban area] and 2,410,960 in the metropolitan area. The city is located in the province of North Holland in the west of the country but is not its capital, which is Haarlem. The metropolitan area comprises much of the northern part of the Randstad, one of the larger conurbations in Europe, with a population of approximately 8 million.

Cork is a city in south-west Ireland, in the province of Munster, which had a population of 125,657 in 2016.

The city is on the River Lee which splits into two channels at the western end and divides the city centre into islands. They reconverge at the eastern end where the quays and docks along the river banks lead outwards towards Lough Mahon and Cork Harbour, one of the largest natural harbours in the world.

Expanded by Viking invaders around 915, the city's charter was granted by Prince John, as Lord of Ireland, in 1185. Cork city was once fully walled, and the remnants of the old medieval town centre can be found around South and North Main streets.

The third largest city on the island of Ireland, the city's cognomen of "the rebel city" originates in its support for the Yorkist cause in the Wars of the Roses. Corkonians often refer to the city as "the real capital", a reference to its opposition to the Anglo-Irish Treaty in the Irish Civil War.

Belfast is a port city in the United Kingdom and the capital city of Northern Ireland, on the banks of the River Lagan on the east coast of Ireland. It is the largest city in Northern Ireland and second largest on the island of Ireland. It had a population of 333,871 in 2015.

By the early 1800s Belfast was a major port. It played a key role in the Industrial Revolution, becoming the biggest linen producer in the world, earning it the nickname "Linenopolis". By the time it was granted city status in 1888, it was a major centre of Irish linen production, tobacco-processing and rope-making. Shipbuilding was also a key industry; the Harland and Wolff shipyard, where the RMS Titanic was built, was the world's biggest shipyard. It also has a major aerospace and missiles industry. Industrialisation and the inward migration it brought made Belfast Ireland's biggest city and it became the capital of Northern Ireland following the Partition of Ireland in 1922. Its status as a global industrial centre ended in the decades after the Second World War.

Belfast suffered greatly in the Troubles, and in the 1970s and 1980s was one of the world's most dangerous cities. However, the city is now considered to be one of the safest within the United Kingdom. Throughout the 21st century, the city has seen a sustained period of calm, free from the intense political violence of former years and has benefitted from substantial economic and commercial growth. Belfast remains a centre for industry, as well as the arts, higher education, business, and law, and is the economic engine of Northern Ireland. Belfast is still a major port, with commercial and industrial docks dominating the Belfast Lough shoreline, including the Harland and Wolff shipyard. It is served by two airports: George Best Belfast City Airport, and Belfast International Airport 15 miles (24 km) west of the city. It is listed by the Globalization and World Cities Research Network (GaWC) as a Gamma global city.

Reykjavík is the capital and largest city of Iceland. It is located in southwestern Iceland, on the southern shore of Faxa Bay. Its latitude is 64°08' N, making it the world's northernmost capital of a sovereign state. With a population of around 123,300 (and over 216,940 in the Capital Region), it is the heart of Iceland's cultural, economic and governmental activity, and is a popular tourist destination.

Reykjavík is believed to be the location of the first permanent settlement in Iceland, which, according to Ingólfr Arnarson, was established in AD 874. Until the 19th century, there was no urban development in the city location. The city was founded in 1786 as an official trading town and grew steadily over the following decades, as it transformed into a regional and later national centre of commerce, population, and governmental activities. It is among the cleanest, greenest, and safest cities in the world.

Reykjavík is the capital and largest city of Iceland. It is located in southwestern Iceland, on the southern shore of Faxa Bay. Its latitude is 64°08' N, making it the world's northernmost capital of a sovereign state. With a population of around 123,300 (and over 216,940 in the Capital Region), it is the heart of Iceland's cultural, economic and governmental activity, and is a popular tourist destination.

Reykjavík is believed to be the location of the first permanent settlement in Iceland, which, according to Ingólfr Arnarson, was established in AD 874. Until the 19th century, there was no urban development in the city location. The city was founded in 1786 as an official trading town and grew steadily over the following decades, as it transformed into a regional and later national centre of commerce, population, and governmental activities. It is among the cleanest, greenest, and safest cities in the world.

Isafjörður, meaning ice fjord or fjord of ice, ice in plural genitive) is a town in the northwest of Iceland.

The oldest part of Ísafjörður with the town centre is located on a spit of sand, or eyri, in Skutulsfjörður, a fjord which meets the waters of the larger fjord Ísafjarðardjúp. With a population of about 2,600, Ísafjörður is the largest settlement in the peninsula of Vestfirðir (Westfjords) and the administration centre of the Ísafjarðarbær municipality, which includes – besides Ísafjörður – the nearby villages of Hnífsdalur, Flateyri, Suðureyri, and Þingeyri.

Akureyri is a town in northern Iceland. It is Iceland's Fifth largest municipality.

Nicknamed the Capital of North Iceland, Akureyri is an important port and fishing centre. The area where Akureyri is located was settled in the 9th century but did not receive a municipal charter until 1786. The town was the site of Alliedunits during World War II. Further growth occurred after the war as the Icelandic population increasingly moved to urban areas.

The area has a relatively mild climate because of geographical factors, and the town's ice-free harbour has played a significant role in its history.

Amsterdam is the capital city and most populous municipality of the Netherlands. Its status as the capital is mandated by the Constitution of the Netherlands, although it is not the seat of the government, which is The Hague. Amsterdam has a population of 851,373 within the city proper, 1,351,587 in the urban area] and 2,410,960 in the metropolitan area. The city is located in the province of North Holland in the west of the country but is not its capital, which is Haarlem. The metropolitan area comprises much of the northern part of the Randstad, one of the larger conurbations in Europe, with a population of approximately 8 million.