Dublin is one of the most popular European cities for tourists young and old. For the more discerning tourist the centre of Dublin offers a wealth of architecture from previous centuries, and visits to Trinity College, The Guiness Brewery, The GPO in O`Connell Street are recommended. One of the beauties of Dublin is that you are by the sea and near the mountains, and trips to Killiney or Dalkey (by the sea) and Powerscourt Gardens are recommended. If you are feeling energetic you could climb the Sugar Loaf Mountain which is only one hour from the city centre.