Belfast (meaning: "mouth of the sandbanks") is the capital and largest city of Northern Ireland, the second-largest city in Ireland after Dublin, and is situated around the River Lagan, which runs through the city. It is a port city known as the birthplace of the RMS Titanic, and for its political murals, documenting the ‘Troubles’ of the 20th century. Today, Belfast remains a centre for industry, as well as the arts, higher education, business, and law, and is the economic engine of Northern Ireland. The city suffered greatly during the period of conflict called "the Troubles", but latterly has undergone a sustained period of calm, free from the intense political violence of former years, and substantial economic and commercial growth. Additionally, Belfast city centre has undergone considerable expansion and regeneration in recent years, notably around Victoria Square.

Waterford is the oldest city in Ireland famous for its crystal ware and intriguing medieval history. Located on the River Suir, Waterford was once one of the most important European ports in times past. Today, Waterford still maintains its 'small Irish town' feel, and has a much more relaxed vibe than the larger cities, whilst still providing for most traveler's tastes. Appealing most, perhaps, to interests including history, culture, music and arts. Waterford, like most Irish towns, has a lot of pubs.

Derry is the second-largest city in Northern Ireland and the fourth-largest city on the island of Ireland. The name Derry is an anglicisation of the Irish name Daire or Doiremeaning "oak grove". In 1613, the city was granted a Royal Charter by King James I and gained the "London" prefix to reflect the funding of its construction by the London guilds. While the city is more usually known colloquially as Derry, Londonderry is also commonly used and remains the legal name. The old walled city lies on the west bank of the River Foyle, which is spanned by two road bridges and one footbridge. The city now covers both banks (Cityside on the west and Waterside on the east). The district administered by Derry City and Strabane District Council contains both Londonderry Port and City of Derry Airport.

Galway is a city in County Galway, Republic of Ireland. It is the fifth largest and the fastest-growing city in Ireland. Located on the west coast of Ireland, the city’s hub is 18th-century Eyre Square, a popular meeting spot surrounded by shops and traditional pubs that often offer live Irish folk music.  Galway is famed as Ireland's Cultural Heart and is renowned for its vibrant lifestyle and numerous festivals, celebrations and events. Every July, Galway hosts the Galway Arts Festival which is known for its famous Macnas parade.

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.