To be honest, Dublin is like most large cities, particularly London, with similar architecture and activities. Two days was definitely plenty to see all of Dublin, so if we do happen to travel back to Ireland, I would like to skip the city and see the rolling hills + the cliffs. That being said, if you have two days in Dublin, there is plenty to do + see:
Dublin Castle: While we didn’t go inside the castle to view the rooms, just seeing the castle and its architecture is pretty amazing. The fact that this giant structure still exists in the middle of their city is unbelievable. The castle has a beautiful garden to walk through {or to use as a backdrop during a proposal to the girl of your dreams ;)}.