Dublin Suggestions

We're planning on 2.5 days in Dublin at the beginning of our trip, and then another evening there before our flight back out our last morning in Ireland.  We're hoping to book a room at the Grafton Capital Hotel near Trinity College in Dublin for $96/night off hotels.com.

Suggestions from my friend Rachel for Dublin are:

Dublin castle

Guiness factory

Trinity college

Bus tour to Howth (feed the sea lions)