King House was the home of the "Kings of Connaught", one of the wealthiest families in seventeenth century Ireland. The house became an army barrcks when the Kings moved to Rockingham, but has since been restored and now houses an exhibition on the King family in Ireland.
Boyle Abbey was built in the twelfth century by the cistercian order, and exhibits several styles of archetcture from that period. The abbey was plundered by the Normans in the thirteenth century, and dissolved in the sixteenth century. Cromwellian sodiers inhabited the building in the seventeenth century, and did considerable damage.
Lough Key Forest Park was once home to the King family, but is now a forest park, ideal for picnics and walks, and the flora of the park is of interest. The Lough has many islands, and one has the ruins of a nineteenth century castle on the site of a much earlier castle.
Trinity Island holds the ruins of an thirteenth century Premonstratensian house of canons, built on the ruins of an earlier Christian Monastery. There are also ruins on Church Island and Hermit Island