Howth is a charming little town north of Dublin. Great views. I've since forgotten the name of the place, but I will say that the service at the little pub near the bus-stop is just lousy :-)... the bar at the top of the hill was significantly better (should've eaten there).
Definitely take the bus to the top of the hill (the walk would be murderous), and take in the views. Then take in a pint at the bar.
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