Mentioned by TripSavvy
8 Amazing Castles to Visit Near Dublin
"Drimnagh Castle is one of the few medieval castles that is still standing in Dublin. The structure dates back to the 12th century and was originally built by the Barnewell family, who arrived in Ireland with Strongbow. The Norman castle can be found in the suburb of Drimnagh, and it is worth the trip to the south side to see the pretty stone castle—which happens to be the only castle in Ireland with a moat."