just go check Dublin out! something for everyone
Dublin really is a world class city with lots of offer. St Patrick's cathedral is fantastic. St. Stephen's green is their green lung. Visit Trinity college, the most prestigious in Ireland. Walk across the River Liffey on the O'Connell St. Bridge on route to the spire. go for historic buildings, monuments and pub culture. don't go for scenic landscape you'll want a car for that. nothing about Dublin will really blow you away but the sum of its parts will make you wanna go back!
Insider Tip:-rent a car and head for the Dingle peninsula for "quintessential Irish postcard" scenery.
-the airlink bus is your best bet from the airport. choose the option for a return trip when you purchase your ticket as it'll save you money