That depends on what you would like to do. For a fun night out and clubbing go to Galway or Dublin or Derry or Belfast. For the sites and the beauty you could visit the cliffs of Moher in Galway or Dingle (An Daingean) in County Kerry it is really beautiful. For Surfing go to Sligo or Donegal. W.B. Yeats loved County Sligo he wrote some of his best poetry there. I personally love going to Cork, once you drive onto the smaller roads you will find unbelievable beauty, untouched views. It really can be such a mythical and magical place.

I have only been to the central part of Ireland but I think it is a magical place too!