There are plenty of "one-day" tours you can sign up for that will take to you various places around the country including the Cliffs of Moher, Blarney Castle, and Giant's Causeway. Most of these trips provide the transportation necessary to get to these locations if you're weary about driving yourself. Below are some of the activities we have done and/or heard of to do while in Dublin in case you don't want to travel too far out of the city during your stay.