Guinness Storehouse: Located at St. James’s Gate in Dublin City, this iconic attraction explores the history of Guinness, Ireland’s famous stout. Dublin Castle: A historic complex in Dublin City, dating back to the 13th century, once the seat of British rule. St. Patrick’s Cathedral: Ireland’s largest cathedral, founded in 1191, linked to St. Patrick, Ireland’s patron saint. National Museum of Ireland – Archaeology: Located in Dublin City, this museum showcases Ireland’s ancient past. Dublin is also Ireland’s most visited tourist county by a margin, with around four million international visitors per year.