Kilronan Castle Estate & Spa should be on your list of castles to stay at in Ireland. The luxury 4 star castle hotel is situated in County Roscommon in a secluded corner of the idyllic West of Ireland. Built in the 18th century, the Kilronan Castle resort welcomes its guests through a set of magnificent medieval gates at the top of a meandering driveway through an ancient forest which is surrounded by fifty acres of lush green estate and next to a beautiful lough making the castle look like something straight out of a fairytale.