Explore Guinness Storehouse with a pint and a panoramic view of the city. (2 hours)
Take in the centuries-old architecture while wandering through Trinity College and see the famous Book of Kells. (1 hour)
Grab some dinner and live music at The Brazen Head, Ireland's oldest pub. (2 hours)
Explore the underground caverns of Carlingford Adventure Centre, taking part in zip-lining, laser combat, and team challenges. (4 hours)
See Belfast's political history with a black cab tour, visiting the walls and murals that tell the story of the city's past. (2 hours)
Visit the Titanic Belfast museum, the world's largest Titanic visitor experience. (2 hours)
Hike along the Giant's Causeway, one of Ireland's most unique natural wonders. (2 hours)
Explore Dunluce Castle, a medieval castle perched on the edge of a cliff. (1 hour)
Surf the waves at Bundoran Beach, one of the best surf spots in the country. (3 hours)
Hike through the Connemara National Park, taking in the stunning views of the Twelve Bens mountain range. (3 hours)
Take a ferry to the Aran Islands and cycle around Inis Mór, the largest of the three islands. (4 hours)
Hike to the top of Lugnaquilla, the highest peak in the Wicklow Mountains. (5 hours)
Relax and unwind at the Powerscourt Hotel and Gardens, voted one of the world's top 10 gardens. (2 hours)
If you have more time, consider spending an extra day exploring Belfast and its surrounding areas, or spending some time in Galway and exploring the Cliffs of Moher. If you have less time, consider cutting out Donegal and Connemara, or skipping the Inis Mór bike rental or Lugnaquilla hike.