We took a train from Belfast to Dublin. It is a 2.5 hours train ride. We planned our trip to enjoy St. Patricks Day in Dublin.
Day 1: We saw St. Patrick Cathedral, Grafton Street, St. Stephens Green, and Trinity College Library. In the evening we did the Jameson Distillery Tour and enjoyed the rest of the evening in different pubs.
Day 2: We had booked a Guinness Storehouse Tour - a must-go place.
Rest of the 2nd day and 3rd day we enjoyed the St. Patrick's Day festivities, parade, and partied a lot.