In the townland of Glannalappa Middle in County Kerry, a curious rectangular enclosure appears on the 1914-15 Ordnance Survey map, marking what appears to be a medieval moated site.

Standing at the heart of a rectangular earthwork in Parkavonear, County Kerry, this circular stone tower rises approximately eight metres into the Irish sky.

On a steep north-facing slope in Killeagh, County Kerry, once stood a remarkable earthen enclosure that puzzled archaeologists and fascinated locals for generations.

On the western shores of Dingle Harbour in County Kerry once stood Ballingolin Castle, a stronghold of the Rice family that met its demise sometime before 1641.

Standing in the townland of Ballyplimoth in County Kerry, this tower house represents a typical example of the fortified residences built by Gaelic and Anglo-Norman families across Ireland between the 15th and 17th centuries.

Pallis Fort sits on the Ardcrone peninsula in County Kerry, a modest yet intriguing reminder of Ireland's turbulent past.

On a steep hillside in the townland of Tooreen, County Kerry, lies what was once the refuge of one of Ireland's most famous fugitives.

In the townland of Castledrum, meaning 'castle of the ridge', once stood a stronghold of the Moriarty family that played a significant role in Kerry's turbulent history.

Standing in the rural landscape of Ballybeggan, County Kerry, this tower house represents a common form of fortified dwelling that once dotted the Irish countryside.

The ruins of Ballineanig Castle, also known as Castle Marhin, once stood on the southern shore of Smerwick Harbour in County Kerry.

On the edge of a cliff in County Kerry stand the crumbling remains of Browne's Castle, a 15th-century tower house that may have been built by a family of pirates.

In the townland of Bawn, Dunkerron, County Kerry, the remains of an ancient ringfort offer a glimpse into Ireland's early medieval past.

Rathmorrell Castle in County Kerry stands as one of Ireland's more enigmatic ruins, with barely a whisper of its original form remaining today.

Kilmurry Castle stands in the parish of Ballincuslane, or Baile an Chaisleáin in Irish, which literally translates to 'town of the castle'.

On the western shore of Ballinskelligs Bay stands the evocative remains of Ballinskelligs Abbey, a medieval priory that served as a crucial link between one of Ireland's most dramatic monastic sites and the mainland.