Trinity College (Book of Kells), Guinness Storehouse, Dublin Castle, St. Patrick's & Christ Church Cathedrals, lively Temple Bar, museums (EPIC, National Gallery, Little Museum), and green spaces like St. Stephen's Green, plus distillery tours and unique experiences like Glasnevin Cemetery.
The Giant's Causeway is and area of approximately 40,000 interlocking basalt columns, the result of an ancient volcanic fissure eruption Or the more fun story…. Legend has it the stones were part of a pathway built by Finn McCool, the Irish giant, to face his Scottish rival in battle