Errigal is a 751-metre mountain near Gweedore in County Donegal, Ireland. It is the tallest peak of the Derryveagh Mountains and the tallest peak in County Donegal. Errigal is also the most southern and the highest of the mountain chain called the "Seven Sisters" by locals. Wikipedia
built in the 1860s the stone building was once a school house. Owned by three generations of the same family the house has been refurbished but still retains its old world charm.
You can see photos of the inside listed on airbnb.ie