The great semi-fortified house at Portumna was built before 1618 by Richard Burke or de Burgo, 4th Earl of Clanricarde. The ground floor of the house is now open to the public. Exhibitions in the castle and Gate House. Portumna Castle is surrounded by the towns' local attractions - Lough Derg and the Forest Park.
An impressive and well preserved Cistercian Monastery which was founded in the 12th century under the patronage of the local ruling family, the MacDermotts. Boyle Abbey retains its ability to impress the visitor as one of the most formidable of the early Cistercian foundations in Ireland. A restored gatehouse of 16th/17th century houses an exhibition.