1. In the hinterland an area containing numerous examples of Rock Art possible dating to the Bronze Age
2. A number of Iron Age or Early Christian raths
3. A round tower associated with an early ecclesiastical foundation
4. A Norman motte and bailey with the possible much ruined remains of a gatehouse and bawn
1. Rock Art
Is also recorded in the Monaghan Inventory. The entry is as follows: Rock Art, at least seventy examples of cup and ring marks visible on five areas of rock outcrop in the townland of Drumerril. Public access is not available.
2. Iron Age or Early Christian Raths
Many of the raths are listed in the archaeological inventory of Counties Monaghan and Louth. These range from uni-vallate types to the impressive multi-valate enclosures of which Shancoduff bi-vallate rath with an associate southerrain is a good example.
3. Round Tower
The round tower is well known and is a National Monument and appears in Lennox Burrow’s The Round Towers of Ireland. The ecclesiastical foundation is listed in Gwynn and Hadcock. They record that St. Daig Mac Carell (d.587 Annals of Ulster) was abbot and bishop (Acta Santorum Hiberniae). He brought many virgins to live under his rule, but later removed them to monasteries of their own to the north. Flann O Dachua recorded by the Annals of Ulster, was a wise abbot and later bishop, was poisoned in 784. Other abbots are recorded up to 930. The site was burned in 789, plundered in 948 and burned again in 1166.
4. The Motte and Bailey
Known as Inniskeen Motte is recorded in the Monaghan Inventory as follows: Motte and Bailey, Bawn, Large circular flat topped mound with fosse visible from SE-W-NE at base. Traces of broad oval bailey extending E from Motte. Souterrain reported to exist in mound. Immediately NE of bailey is a rectangular enclosure with high stone walls and entrance through large arch. Foundations of gatehouse visible on inside.