Durhamstown Castle (County Meath, Ireland)

This Norman Castle in County Meath, Ireland goes all the way back to 1420. If GoT was based on a real time period, it wouldn’t be a stretch to say it took place in the 15th century (Wars of the Roses, anyone?). Experience 600-year-old plaster inside the four original vaulted rooms, have a feast in the quaint dining room and retire to the drawing or music room in the evening hours for a carafe of wine (Cersei style, of course).