Rising from slightly elevated ground amid the marshlands of County Offaly, the fortified house and bawn at Oakleypark offers a glimpse into Ireland's turbulent past when such defensive structures were essential for survival.

On an elevated rock outcrop in Castlebarnagh Big, County Offaly, the earthen banks of what appears to be a medieval tower house and bawn tell a story of territorial power in Gaelic Ireland.

In the low-lying floodplains near the Camcor River in County Offaly, a few grass-covered mounds mark the spot where O'Carrolls Castle once stood.

On a natural rock outcrop rising from the floodplains near Whigsborough in County Offaly, the scattered remains of what locals call Le Porte Castle tell a story of medieval fortification now largely reclaimed by time.

In the flat countryside near Monasteroris in County Offaly stands an unusual earthwork that hints at medieval ingenuity.

In the rolling countryside of County Offaly, the ghost of a long-lost house haunts both historical maps and the modern landscape.

In the townland of Gorteen, County Offaly, the remnants of what appears to have been a medieval moated site lie completely hidden beneath centuries of agricultural activity.

Geashill Castle stands at the northwest corner of a 19th-century house in Dalgan, County Offaly, its weathered limestone walls telling a story of centuries of change and conflict.

In the townland of Ballynasrah, County Offaly, a modern bungalow sits on what was once the site of Feddaun Castle.

Cloghan Castle stands on elevated ground overlooking the Shannon River's floodplains in County Offaly, presenting a well-preserved example of late 16th or early 17th-century Irish tower house architecture.

At the northwest end of a 19th-century house in Dalgan, County Offaly, stand the weathered remains of a medieval tower house that tells a story of centuries of conflict and adaptation.

Situated on a gentle rise in the rolling countryside of Kilclonfert, County Offaly, the remnants of Kill Castle tell a story of medieval fortification and religious life existing side by side.

Where the post office now stands in Cloghan, County Offaly, once stood a formidable three-storey fortified house that dominated the local landscape.

On the western end of an esker ridge in County Offaly stands Esker Castle, a multi-period fortification that commanded strategic views over the surrounding countryside and two important medieval routeways.

In the countryside near Castlereagh, County Offaly, a curious square-shaped earthwork sits on poorly drained lowland, with slightly higher ground rising to the northeast.