Cratloe is the location of several ruined castles and tower houses, the most notable being Cratloemoyle Castle (sometimes referred to as 'Cratloe Castle'), located just to the north of the N18 road on the approach to Limerick. The castle is 5 stories high and was built sometime in the early 1500s. John McNamara, who died in 1780, was the last occupant of the castle and as he had no one to pass the castle onto, the castle was sold and for the first time in 700 years the land around the castle was not in the possession of the McNamara family.