Just spotted this today. This is Coolbawn Abbey, home of the Bruen family. It was burned in the Troubles. The Tector family were the owners in the mid 80s, and probably still are.
It’s also on the River Boro, not far from Castleboro – and might be near Bree?
When I visited it last, maybe 20 years ago, the cellars were being used as a dump for domestic refuse.