Just 3.5 km east of Bagenalstown Ballymoon Castle dates to the 14th century. Ballymoon Castle as striking as it is unusual comprises a courtyard about 80 feet square, surrounded by granite walls, 8 feet thick and 20 feet high. Square towers project from three sides while a formidable gatehouse is the feature of the fourth.
The interior of Ballymoon Castle is now bare but originally featured two-storey structures built up against the inner walls. Ballymoon Castle was most probably built by Roger Bigod or by a member of the Carew family. Access direct from the R724 Bagenalstown – Fenagh road via small timber footbridge.