Dublin, capital of the Republic of Ireland, is on Ireland's east coast at the mouth of the River Liffey. Its historic buildings include Dublin Castle, dating to the 13th century, and imposing St Patrick's Cathedral, founded in 1191. City parks include landscaped St Stephen's Green and huge Phoenix Park, containing Dublin Zoo. The National Museum of Ireland explores Irish heritage and culture.
Dublin's O'Connell Bridge that covers the famed River Liffey is reckoned to be the only bridge in the European continent that has the same width as its length.