|Subject: Hostels in Ireland and Italy|
For Ireland, have a look to http://www.hostels-ireland.com/ I stayed 1 month in Dublin in the Celt House hostel. It is a small quiet hostel in a residential area in a walk distance to the city centre (it is close the huge YHI one).
About Italy, if yours sister change their mind and stay near naples, I can suggest a wonderful hostel in positano (Amalfitan coast) from where they can go to Pompeii. The name is Brikette and the web site is http://www.brikette.com
>Also, it is possible to make a day trip from Rome to Pompeii?
yes but they will be quite in rush because Pompeii ruins are huge and interesting.
It is in Ireland. In Italy it is much better and fast the tran system.
Ciao, Marco in Milan.