Sitting between Drumlane and Derrybrick Loughs, are the remains of a 6th Century monastery founded by St. Mogue, the Bishop of Ferns. The round tower is one of the most striking features of the site, standing over 11m high. Look for the carvings of birds on the external wall. The church features a number of interesting stone heads, one above the door in the west wall and another three on the external face of the east window. Near the church there are a series of earthworks, probably the remains of the 12th century Augustinian Priory.
Drumlane Abbey is one of the most beautiful historic sites in Cavan and is well worth a visit. The abbey is located about 1km outside Milltown. Coming from Belturbet, go through the village of Milltown. Just as you are rounding the bend to the right to leave the village, take a left, then immediately right. Follow the road for 1km to Drumlane Abbey.