Trinity College and The Long Room
An oasis of tranquility in the teeming center of Dublin, this campus of wide green lawns and stately 16th-century buildings is the city’s undisputed jewel. Come on a clear day, and wander the paths where students like Oscar Wilde and Samuel Beckett once walked—through the looming Front Arch, across the central square dominated by the towering Campanile. Then pay a visit to the stunning, barrel-vaulted Long Room—a library that looks like a cross between a cathedral of knowledge and the set of a Harry Potter film. Be sure to peek at the Book of Kells, a priceless illuminated manuscript that’s housed here.