Dunboy Castle on the Beara Peninsula. This served as the home of the Puxley family from 1730 to 1921.
It has been through quite a history. Most recent was an attempt to refurbish the place as a five star
hotel/resort. The economic crisis of 2008 put a quick stop to the work.
See this story from the May 7, 2011 edition of the Irish Examiner.