Ballinafad Castle
Known as the Castle of the Curlews, this castle was built around 1590 to protect the pass over the Curlew Hills. It was garrisoned by a Constable and ten wardens from 1610 to 1626 and, after a stout resistance, had to surrender in 1641 due to lack of water. The plan of the castle is modeled on those of 13th century castles, with a small central square block dwarfed by four massive towers at the corners which are round outside and square inside.