The top five cities to visit in Northern Ireland are Belfast, Derry/Londonderry, Armagh, Lisburn, and Newry. Belfast, the vibrant capital, offers rich history and lively culture. Derry/Londonderry boasts stunning architecture and a compelling past. Armagh is known for its beautiful cathedrals and Georgian charm. Lisburn offers delightful shopping experiences, while Newry is a gateway to the scenic Mourne Mountains. Each city provides unique attractions and experiences for travellers.