Ardfinnan Castle - Credit: Wikimedia Commons
Ardfinnan Castle, is the sister castle of Lismore Castle and was built circa 1185 to guard the river crossing at Ardfinnan (Ard Fhíonáin in Irish) in County Tipperary, Ireland. It is situated on the River Suir, seven miles west of Clonmel. The castle is currently privately owned and is not open for public viewing. Read more on Wikipedia
Source: en.wikipedia.org