Spend your time in port in Dublin checking out the capital city's top historical attractions on this full-day shore excursion. Considered the jewel in the Emerald Isle's crown, Dublin is a city teeming with history and culture. Head to the city center for a glimpse of several historical monuments, including Dublin Castle and the Guinness brewery. Explore St PatRick's Cathedral and Trinity College, and enjoy a couple of hours of free time for shopping, eating or drinking at a local pub before heading back to your cruise port.