Set in Phoenix Park, Áras an Uachtaráin was once the Viceregal Lodge, the summer retreat of the British viceroy, whose main digs were in Dublin Castle. From what were never humble beginnings, the original 1751 country house was expanded several times, gradually becoming the splendid neoclassical white mansion you see today, which now serves as the official residence of Ireland’s president. Guided tours leave from the Phoenix Park Visitor Centre every Saturday. After an introductory historical film, a bus brings visitors to and from the house for a 1-hour tour of the state reception rooms (tours run a little longer in summer, when the gardens are included on the itinerary, weather permitting). Since the building is still the official home of the Irish president, a strictly limited number of tickets are given out, on a first-come, first-served basis. The house may occasionally be closed for state events, so it’s wise to call ahead. Note: For security reasons, no backpacks, travel bags, strollers, cameras, or mobile phones are allowed on the tour.