Trinity College Library (the 'Long Room'), Dublin. There has been a library at the College ever since it was founded (in but the Long Room was not begun until Completed in it is the largest library in Ireland, containing books.
Colorful hostel in Killarney, Ireland (by philhaber) I absolutely love this place.) who runs the place is the best host I think I've ever come across. This is a must stay if you go to Ireland as far as I am concerned.