5 DUBLIN CASTLE
Perched on the site of a Danish Viking fortress from 930AD, and with its first stone cast by King John of England in 1230, Dublin Castle’s historical significance did not stop there. Under British rule from that point until 1921 (it was a key target during the 1916 Easter Rising), it has been a court, a fortress, even a site of execution in its time, and its architecture has evolved and grown with each metamorphasis.
In truth, it feels more like a rambling campus than an actual castle – not many turrets in sight – but it’s the setting for every big state event, including presidential inaugurations. Wander the grounds, or take a guided tour to the state apartments, medieval undercroft and the Chapel Royal.